diff --git a/.gitignore b/.gitignore
index 9513359..0bb0088 100644
--- a/.gitignore
+++ b/.gitignore
@@ -47,6 +47,7 @@ yarn-error.log
 /public/userarea/class/curl_auth_debug.log
 /public/userarea/class/curl_request_debug.log
 /public/userarea/schema_dettagli_response.json
+public/userarea/schemi_base_response.json
 
 # File XLSX temporanei importati
 /public/userarea/imported_trf/*.xlsx
diff --git a/public/userarea/mapping_template_xls_scheme2.php b/public/userarea/mapping_template_xls_scheme2.php
index 8dbd732..f36ca48 100644
--- a/public/userarea/mapping_template_xls_scheme2.php
+++ b/public/userarea/mapping_template_xls_scheme2.php
@@ -265,6 +265,47 @@ $apiSampleJson = $template['api_sample_json'] ?? '';
             font-family: Consolas, Monaco, monospace;
             font-size: 13px;
         }
+
+        .select2-container--default .select2-results__option {
+            white-space: nowrap;
+            overflow: hidden;
+            text-overflow: ellipsis;
+            max-width: 520px;
+        }
+
+        .select2-json-node {
+            font-weight: 600;
+        }
+
+        .select2-json-value {
+            color: #6c757d;
+            font-size: 12px;
+            margin-left: 8px;
+        }
+
+        .select2-json-row {
+            display: block;
+            margin: -6px;
+            padding: 6px;
+        }
+
+        .select2-results__option:has(.select2-json-row.used-option) {
+            background-color: #fff3cd !important;
+            color: #856404 !important;
+            font-weight: 600;
+        }
+
+        .select2-results__option:has(.select2-json-row.used-option).select2-results__option--highlighted {
+            background-color: #ffe69c !important;
+            color: #856404 !important;
+        }
+
+        .select2-json-row.used-option .select2-json-node::after {
+            content: " (already used)";
+            color: #856404;
+            font-size: 12px;
+            font-weight: 600;
+        }
     </style>
 </head>
 
@@ -1018,6 +1059,42 @@ $apiSampleJson = $template['api_sample_json'] ?? '';
             return escapeHtmlText(str);
         }
 
+        let jsonNodeLabels = {};
+
+        function getLastJsonNodeName(path) {
+            return String(path || '')
+                .replace(/\[\]/g, '')
+                .split('.')
+                .pop();
+        }
+
+        function formatJsonSampleValue(value) {
+            if (value === null || value === undefined) return '';
+
+            let text = '';
+
+            if (Array.isArray(value)) {
+                text = '[Array]';
+            } else if (typeof value === 'object') {
+                text = '{Object}';
+            } else {
+                text = String(value);
+            }
+
+            text = text
+                .replace(/[\r\n\t]+/g, ' ')
+                .replace(/\s+/g, ' ')
+                .trim();
+
+            if (text === '/' || text === '\\/') return '';
+
+            if (text.length > 38) {
+                text = text.substring(0, 38) + '...';
+            }
+
+            return text;
+        }
+
         function flattenJsonNodes(obj, prefix = '') {
             let nodes = [];
 
@@ -1036,6 +1113,14 @@ $apiSampleJson = $template['api_sample_json'] ?? '';
                     if (value !== null && typeof value === 'object') {
                         nodes = nodes.concat(flattenJsonNodes(value, path));
                     } else {
+                        const sample = formatJsonSampleValue(value);
+                        const shortName = getLastJsonNodeName(path);
+
+                        jsonNodeLabels[path] = {
+                            shortName: shortName,
+                            sample: sample
+                        };
+
                         nodes.push(path);
                     }
                 });
@@ -1061,18 +1146,128 @@ $apiSampleJson = $template['api_sample_json'] ?? '';
                         if (!clean) return '';
 
                         const isUsed = uniqueUsedNodes.includes(clean) && clean !== currentValue;
-                        const label = isUsed ? `⚠ ${clean} (already used)` : clean;
+                        const info = jsonNodeLabels[clean] || {};
+                        const shortName = info.shortName || getLastJsonNodeName(clean);
+                        const sample = info.sample || '';
+
+                        let label = shortName;
+                        if (sample) {
+                            label += ` — ${sample}`;
+                        }
+
+                        if (isUsed) {
+                            label = `⚠ ${label} (already used)`;
+                        }
+
                         const isSelected = clean === currentValue ? 'selected' : '';
 
-                        return `<option value="${escapeHtmlAttr(clean)}" class="${isUsed ? 'used-option' : ''}" ${isSelected}>${escapeHtmlText(label)}</option>`;
+                        return `
+                    <option 
+                        value="${escapeHtmlAttr(clean)}"
+                        data-short-name="${escapeHtmlAttr(shortName)}"
+                        data-sample="${escapeHtmlAttr(sample)}"
+                        data-full-path="${escapeHtmlAttr(clean)}"
+                        class="${isUsed ? 'used-option' : ''}"
+                        data-used="${isUsed ? '1' : '0'}"
+                        ${isSelected}>
+                        ${escapeHtmlText(label)}
+                    </option>
+                `;
                     })
                     .join('');
 
                 select.innerHTML = '<option value="">Select JSON Node</option>' + options;
                 select.dataset.currentJson = currentValue;
             });
+
+            initSelect2ForJsonDropdowns();
         }
 
+        function initSelect2ForJsonDropdowns() {
+            if (!(window.jQuery && $.fn.select2)) return;
+
+            $('.json-nodes').filter(function() {
+                const tr = this.closest('tr');
+                const mappingSelect = tr ? tr.querySelector('.mapping-select') : null;
+                return mappingSelect && mappingSelect.value === 'json';
+            }).each(function() {
+                const $el = $(this);
+                if (this.style.display === 'none') {
+                    return;
+                }
+                if ($el.hasClass('select2-hidden-accessible')) {
+                    $el.select2('destroy');
+                }
+
+                $el.select2({
+                    width: '100%',
+                    placeholder: 'Select JSON Node',
+                    allowClear: true,
+                    dropdownAutoWidth: false,
+
+                    templateResult: function(data) {
+                        if (!data.id) return data.text;
+
+                        const option = data.element;
+                        const shortName = option.getAttribute('data-short-name') || data.text;
+                        const sample = option.getAttribute('data-sample') || '';
+                        const isUsed = option.getAttribute('data-used') === '1';
+
+                        const $row = $('<span class="select2-json-row"></span>');
+                        if (isUsed) {
+                            $row.addClass('used-option');
+                        }
+                        $row.append(`<span class="select2-json-node">${escapeHtmlText(shortName)}</span>`);
+
+                        if (sample) {
+                            $row.append(`<span class="select2-json-value">${escapeHtmlText(sample)}</span>`);
+                        }
+
+                        return $row;
+                    },
+
+                    templateSelection: function(data) {
+                        if (!data.id) return data.text;
+
+                        const option = data.element;
+                        const shortName = option.getAttribute('data-short-name') || data.text;
+                        const sample = option.getAttribute('data-sample') || '';
+
+                        if (sample) {
+                            return `${shortName} — ${sample}`;
+                        }
+
+                        return shortName;
+                    },
+
+                    matcher: function(params, data) {
+                        if ($.trim(params.term) === '') {
+                            return data;
+                        }
+
+                        const term = params.term.toLowerCase();
+                        const option = data.element;
+
+                        const fullPath = option?.getAttribute('data-full-path')?.toLowerCase() || '';
+                        const shortName = option?.getAttribute('data-short-name')?.toLowerCase() || '';
+                        const sample = option?.getAttribute('data-sample')?.toLowerCase() || '';
+
+                        if (
+                            fullPath.includes(term) ||
+                            shortName.includes(term) ||
+                            sample.includes(term)
+                        ) {
+                            return data;
+                        }
+
+                        return null;
+                    }
+                });
+            });
+        }
+
+
+
         function saveJsonNodes(sampleJson, nodes) {
             return fetch('update_api_json_nodes.php', {
                 method: 'POST',
@@ -1463,258 +1658,217 @@ $apiSampleJson = $template['api_sample_json'] ?? '';
             document.getElementById('updateSchemaButton').addEventListener('click', updateSchemaDetails);
 
             document.getElementById('schemaFieldsBody').addEventListener('change', function(event) {
+                if (!event.target.classList.contains('mapping-select')) return;
 
-                if (event.target.classList.contains('mapping-select')) {
-                    let tr = event.target.closest('tr');
-                    let mappingId = event.target.getAttribute('data-id');
+                const mappingSelect = event.target;
+                const tr = mappingSelect.closest('tr');
+                const mappingId = mappingSelect.getAttribute('data-id');
 
-                    let xlsSelect = tr.querySelector('.xls-columns');
-                    let jsonSelect = tr.querySelector('.json-nodes');
-                    let manualInput = tr.querySelector('.manual-default');
-                    let autoSelect = tr.querySelector('.auto-value-select');
+                const xlsSelect = tr.querySelector('.xls-columns');
+                const jsonSelect = tr.querySelector('.json-nodes');
+                const manualInput = tr.querySelector('.manual-default');
+                const autoSelect = tr.querySelector('.auto-value-select');
 
-                    let mappedColumn = tr.querySelector('.mapped-column');
-                    let mappedJsonNode = tr.querySelector('.mapped-json-node');
+                const mappedColumn = tr.querySelector('.mapped-column');
+                const mappedJsonNode = tr.querySelector('.mapped-json-node');
 
-                    let removeBtn = tr.querySelector('.remove-xls');
-                    let removeJsonBtn = tr.querySelector('.remove-json');
+                const removeBtn = tr.querySelector('.remove-xls');
+                const removeJsonBtn = tr.querySelector('.remove-json');
 
-                    if (event.target.value === 'xls') {
-                        if (xlsSelect) xlsSelect.style.display = 'block';
-                        if (jsonSelect) jsonSelect.style.display = 'none';
-                        if (autoSelect) autoSelect.style.display = 'none';
+                function destroyJsonSelect2() {
+                    if (jsonSelect && window.jQuery && $(jsonSelect).hasClass('select2-hidden-accessible')) {
+                        $(jsonSelect).select2('destroy');
+                    }
+                }
 
-                        if (manualInput) {
-                            manualInput.style.display = 'none';
-                            manualInput.value = '';
-                        }
+                if (mappingSelect.value === 'xls') {
+                    if (xlsSelect) xlsSelect.style.display = 'block';
 
-                        if (mappedColumn) mappedColumn.style.display = 'none';
-                        if (mappedJsonNode) mappedJsonNode.style.display = 'none';
-
-                        if (removeBtn) removeBtn.style.display = xlsSelect && xlsSelect.value ? 'inline-block' : 'none';
-                        if (removeJsonBtn) removeJsonBtn.style.display = 'none';
-
-                    } else if (event.target.value === 'json') {
-                        if (xlsSelect) xlsSelect.style.display = 'none';
-                        if (jsonSelect) jsonSelect.style.display = 'block';
-                        if (autoSelect) autoSelect.style.display = 'none';
-
-                        if (manualInput) {
-                            manualInput.style.display = 'none';
-                            manualInput.value = '';
-                        }
-
-                        if (mappedColumn) mappedColumn.style.display = 'none';
-                        if (mappedJsonNode) mappedJsonNode.style.display = 'none';
-
-                        if (removeBtn) removeBtn.style.display = 'none';
-                        if (removeJsonBtn) removeJsonBtn.style.display = jsonSelect && jsonSelect.value ? 'inline-block' : 'none';
-
-                    } else if (event.target.value === 'manual') {
-                        if (xlsSelect) xlsSelect.style.display = 'none';
-                        if (jsonSelect) jsonSelect.style.display = 'none';
-                        if (autoSelect) autoSelect.style.display = 'none';
-
-                        if (manualInput) {
-                            manualInput.style.display = 'block';
-                        }
-
-                        if (mappedColumn) mappedColumn.style.display = 'none';
-                        if (mappedJsonNode) mappedJsonNode.style.display = 'none';
-
-                        if (removeBtn) removeBtn.style.display = 'none';
-                        if (removeJsonBtn) removeJsonBtn.style.display = 'none';
-
-                    } else if (event.target.value === 'auto') {
-                        if (xlsSelect) {
-                            xlsSelect.style.display = 'none';
-                            xlsSelect.value = '';
-                        }
-
-                        if (jsonSelect) {
-                            jsonSelect.style.display = 'none';
-                            jsonSelect.value = '';
-                        }
-
-                        if (manualInput) {
-                            manualInput.style.display = 'none';
-                            manualInput.value = '';
-                        }
-
-                        if (mappedColumn) mappedColumn.style.display = 'none';
-                        if (mappedJsonNode) mappedJsonNode.style.display = 'none';
-
-                        if (removeBtn) removeBtn.style.display = 'none';
-                        if (removeJsonBtn) removeJsonBtn.style.display = 'none';
-
-                        if (autoSelect) autoSelect.style.display = 'block';
-
-                    } else {
-                        if (xlsSelect) xlsSelect.style.display = 'none';
-                        if (jsonSelect) jsonSelect.style.display = 'none';
-                        if (autoSelect) autoSelect.style.display = 'none';
-
-                        if (manualInput) {
-                            manualInput.style.display = 'none';
-                            manualInput.value = '';
-                        }
-
-                        if (mappedColumn) mappedColumn.style.display = 'none';
-                        if (mappedJsonNode) mappedJsonNode.style.display = 'none';
-
-                        if (removeBtn) removeBtn.style.display = 'none';
-                        if (removeJsonBtn) removeJsonBtn.style.display = 'none';
+                    destroyJsonSelect2();
+                    if (jsonSelect) {
+                        jsonSelect.style.display = 'none';
+                        jsonSelect.value = '';
                     }
 
-                    saveMapping(
-                        mappingId,
-                        event.target.value,
-                        manualInput ? manualInput.value : '',
-                        xlsSelect ? xlsSelect.value : null,
-                        autoSelect ? autoSelect.value : null,
-                        jsonSelect ? jsonSelect.value : null
-                    );
+                    if (autoSelect) autoSelect.style.display = 'none';
 
-                    if (sourceType === 'XLS') updateXlsDropdowns();
-                    if (sourceType === 'API') updateJsonDropdowns();
-
-                    return;
-                }
-
-                if (event.target.classList.contains('main-field-checkbox')) {
-                    const checkbox = event.target;
-                    const mappingId = checkbox.dataset.mappingId;
-                    const value = checkbox.checked ? 1 : 0;
-
-                    // Count only the other Main fields already checked in this table
-                    const otherCheckedMainFields = Array.from(
-                        document.querySelectorAll('#schemaFieldsBody .main-field-checkbox')
-                    ).filter(cb => cb !== checkbox && cb.checked);
-
-                    // If I am checking this one, I can have max 2 total:
-                    // this checkbox + max 1 other already checked
-                    if (checkbox.checked && otherCheckedMainFields.length >= 2) {
-                        checkbox.checked = false;
-                        alert('Puoi selezionare al massimo 2 campi Main.');
-                        return;
+                    if (manualInput) {
+                        manualInput.style.display = 'none';
+                        manualInput.value = '';
                     }
 
-                    fetch('update_main_field.php', {
-                            method: 'POST',
-                            headers: {
-                                'Content-Type': 'application/json'
-                            },
-                            body: JSON.stringify({
-                                template_id: <?php echo $id; ?>,
-                                mapping_id: mappingId,
-                                value: value
-                            })
-                        })
-                        .then(response => response.json())
-                        .then(data => {
-                            if (!data.success) {
-                                console.error("❌ Error updating main_field:", data.message);
+                    if (mappedColumn) mappedColumn.style.display = 'none';
+                    if (mappedJsonNode) mappedJsonNode.style.display = 'none';
 
-                                document.querySelectorAll('#schemaFieldsBody .main-field-checkbox').forEach(cb => {
-                                    cb.checked = cb.dataset.originalChecked === 'true';
-                                });
+                    if (removeBtn) removeBtn.style.display = xlsSelect && xlsSelect.value ? 'inline-block' : 'none';
+                    if (removeJsonBtn) removeJsonBtn.style.display = 'none';
 
-                                alert(data.message || 'Errore durante il salvataggio del campo Main.');
-                                return;
-                            }
-
-                            document.querySelectorAll('#schemaFieldsBody .main-field-checkbox').forEach(cb => {
-                                cb.dataset.originalChecked = cb.checked ? 'true' : 'false';
-                            });
-                        })
-                        .catch(error => {
-                            console.error("❌ Fetch error:", error);
-
-                            document.querySelectorAll('#schemaFieldsBody .main-field-checkbox').forEach(cb => {
-                                cb.checked = cb.dataset.originalChecked === 'true';
-                            });
-
-                            alert('Errore di comunicazione durante il salvataggio del campo Main.');
-                        });
-
-                    return;
-                }
-                if (event.target.classList.contains('visible-import-checkbox')) {
-                    const checkbox = event.target;
-                    const mappingId = checkbox.dataset.mappingId;
-                    const value = checkbox.checked ? 1 : 0;
-                    const prevChecked = checkbox.checked;
-
-                    fetch('update_visible_import.php', {
-                            method: 'POST',
-                            headers: {
-                                'Content-Type': 'application/json'
-                            },
-                            body: JSON.stringify({
-                                template_id: <?php echo $id; ?>,
-                                mapping_id: mappingId,
-                                value: value
-                            })
-                        })
-                        .then(r => r.json())
-                        .then(data => {
-                            if (!data.success) {
-                                console.error("❌ Error updating is_visible_import:", data.message);
-                                checkbox.checked = !prevChecked;
-                                alert(data.message || 'Errore durante il salvataggio del campo Import.');
-                            }
-                        })
-                        .catch(error => {
-                            console.error("❌ Fetch error:", error);
-                            checkbox.checked = !prevChecked;
-                            alert('Errore di comunicazione durante il salvataggio del campo Import.');
-                        });
-
-                    return;
-                }
-                if (event.target.classList.contains('visible-parts-checkbox')) {
-                    const checkbox = event.target;
-                    const mappingId = checkbox.dataset.mappingId;
-                    const value = checkbox.checked ? 1 : 0;
-                    const prevChecked = checkbox.checked;
-
-                    if (value === 1) {
-                        document.querySelectorAll('.visible-parts-checkbox').forEach(cb => {
-                            if (cb !== checkbox) cb.checked = false;
-                        });
+                } else if (mappingSelect.value === 'json') {
+                    if (xlsSelect) {
+                        xlsSelect.style.display = 'none';
+                        xlsSelect.value = '';
                     }
 
-                    fetch('update_visible_parts.php', {
-                            method: 'POST',
-                            headers: {
-                                'Content-Type': 'application/json'
-                            },
-                            body: JSON.stringify({
-                                template_id: <?php echo $id; ?>,
-                                mapping_id: mappingId,
-                                value: value
-                            })
-                        })
-                        .then(r => r.json())
-                        .then(data => {
-                            if (!data.success) {
-                                console.error("❌ Error updating is_visible_parts:", data.message);
-                                checkbox.checked = !prevChecked;
-                                location.reload();
-                            }
-                        })
-                        .catch(error => {
-                            console.error("❌ Fetch error:", error);
-                            checkbox.checked = !prevChecked;
-                            location.reload();
-                        });
+                    if (jsonSelect) {
+                        jsonSelect.style.display = 'block';
+                    }
 
-                    return;
+                    if (autoSelect) autoSelect.style.display = 'none';
+
+                    if (manualInput) {
+                        manualInput.style.display = 'none';
+                        manualInput.value = '';
+                    }
+
+                    if (mappedColumn) mappedColumn.style.display = 'none';
+                    if (mappedJsonNode) mappedJsonNode.style.display = 'none';
+
+                    if (removeBtn) removeBtn.style.display = 'none';
+                    if (removeJsonBtn) removeJsonBtn.style.display = jsonSelect && jsonSelect.value ? 'inline-block' : 'none';
+
+                    updateJsonDropdowns();
+
+                } else if (mappingSelect.value === 'manual') {
+                    if (xlsSelect) xlsSelect.style.display = 'none';
+
+                    destroyJsonSelect2();
+                    if (jsonSelect) {
+                        jsonSelect.style.display = 'none';
+                        jsonSelect.value = '';
+                    }
+
+                    if (autoSelect) autoSelect.style.display = 'none';
+
+                    if (manualInput) {
+                        manualInput.style.display = 'block';
+                    }
+
+                    if (mappedColumn) mappedColumn.style.display = 'none';
+                    if (mappedJsonNode) mappedJsonNode.style.display = 'none';
+
+                    if (removeBtn) removeBtn.style.display = 'none';
+                    if (removeJsonBtn) removeJsonBtn.style.display = 'none';
+
+                } else if (mappingSelect.value === 'auto') {
+                    if (xlsSelect) {
+                        xlsSelect.style.display = 'none';
+                        xlsSelect.value = '';
+                    }
+
+                    destroyJsonSelect2();
+                    if (jsonSelect) {
+                        jsonSelect.style.display = 'none';
+                        jsonSelect.value = '';
+                    }
+
+                    if (manualInput) {
+                        manualInput.style.display = 'none';
+                        manualInput.value = '';
+                    }
+
+                    if (mappedColumn) mappedColumn.style.display = 'none';
+                    if (mappedJsonNode) mappedJsonNode.style.display = 'none';
+
+                    if (removeBtn) removeBtn.style.display = 'none';
+                    if (removeJsonBtn) removeJsonBtn.style.display = 'none';
+
+                    if (autoSelect) autoSelect.style.display = 'block';
+
+                } else {
+                    if (xlsSelect) xlsSelect.style.display = 'none';
+
+                    destroyJsonSelect2();
+                    if (jsonSelect) {
+                        jsonSelect.style.display = 'none';
+                        jsonSelect.value = '';
+                    }
+
+                    if (autoSelect) autoSelect.style.display = 'none';
+
+                    if (manualInput) {
+                        manualInput.style.display = 'none';
+                        manualInput.value = '';
+                    }
+
+                    if (mappedColumn) mappedColumn.style.display = 'none';
+                    if (mappedJsonNode) mappedJsonNode.style.display = 'none';
+
+                    if (removeBtn) removeBtn.style.display = 'none';
+                    if (removeJsonBtn) removeJsonBtn.style.display = 'none';
                 }
 
+                saveMapping(
+                    mappingId,
+                    mappingSelect.value,
+                    manualInput ? manualInput.value : '',
+                    xlsSelect ? xlsSelect.value : null,
+                    autoSelect ? autoSelect.value : null,
+                    jsonSelect ? jsonSelect.value : null
+                );
+
+                if (sourceType === 'XLS') updateXlsDropdowns();
             });
 
+            function saveJsonNodeSelection(jsonSelect) {
+                if (!jsonSelect) return;
+
+                let tr = jsonSelect.closest('tr');
+                let mappingId = jsonSelect.getAttribute('data-id');
+                let manualInput = tr.querySelector('.manual-default');
+                let mappedJsonNode = tr.querySelector('.mapped-json-node');
+                let removeJsonBtn = tr.querySelector('.remove-json');
+                let mappingSelect = tr.querySelector('.mapping-select');
+
+                if (mappingSelect && mappingSelect.value !== 'json') {
+                    return;
+                }
+
+                if (!mappedJsonNode) {
+                    mappedJsonNode = document.createElement('span');
+                    mappedJsonNode.className = 'mapped-json-node';
+                    mappedJsonNode.style.marginLeft = '5px';
+                    tr.querySelector('td:nth-child(7)').appendChild(mappedJsonNode);
+                }
+
+                if (!removeJsonBtn) {
+                    removeJsonBtn = document.createElement('button');
+                    removeJsonBtn.className = 'btn btn-danger btn-sm remove-json';
+                    removeJsonBtn.textContent = 'X';
+                    removeJsonBtn.style.marginLeft = '5px';
+                    removeJsonBtn.setAttribute('data-id', mappingId);
+                    tr.querySelector('td:nth-child(7)').appendChild(removeJsonBtn);
+                }
+
+                mappedJsonNode.textContent = jsonSelect.value ? `(${jsonSelect.value})` : '';
+                mappedJsonNode.style.display = jsonSelect.value ? 'inline' : 'none';
+                removeJsonBtn.style.display = jsonSelect.value ? 'inline-block' : 'none';
+
+                console.log('[JSON NODE SAVE]', {
+                    mappingId: mappingId,
+                    value: jsonSelect.value
+                });
+
+                saveMapping(
+                    mappingId,
+                    'json',
+                    manualInput ? manualInput.value : '',
+                    null,
+                    null,
+                    jsonSelect.value
+                );
+            }
+
+            document.getElementById('schemaFieldsBody').addEventListener('change', function(event) {
+                if (!event.target.classList.contains('json-nodes')) return;
+                saveJsonNodeSelection(event.target);
+            });
+
+            if (window.jQuery) {
+                $(document).on('select2:select select2:clear', 'select.json-nodes', function() {
+                    saveJsonNodeSelection(this);
+                });
+            }
+
 
             // Save original Main checkbox state
             document.querySelectorAll('#schemaFieldsBody .main-field-checkbox').forEach(cb => {
@@ -1797,51 +1951,6 @@ $apiSampleJson = $template['api_sample_json'] ?? '';
                 }
             });
 
-            document.getElementById('schemaFieldsBody').addEventListener('change', function(event) {
-                if (event.target.classList.contains('json-nodes')) {
-                    let tr = event.target.closest('tr');
-                    let mappingId = event.target.getAttribute('data-id');
-                    let manualInput = tr.querySelector('.manual-default');
-                    let mappedJsonNode = tr.querySelector('.mapped-json-node');
-                    let removeJsonBtn = tr.querySelector('.remove-json');
-
-                    if (!mappedJsonNode) {
-                        mappedJsonNode = document.createElement('span');
-                        mappedJsonNode.className = 'mapped-json-node';
-                        mappedJsonNode.style.marginLeft = '5px';
-                        tr.querySelector('td:nth-child(7)').appendChild(mappedJsonNode);
-                    }
-
-                    if (!removeJsonBtn) {
-                        removeJsonBtn = document.createElement('button');
-                        removeJsonBtn.className = 'btn btn-danger btn-sm remove-json';
-                        removeJsonBtn.textContent = 'X';
-                        removeJsonBtn.style.marginLeft = '5px';
-                        removeJsonBtn.setAttribute('data-id', mappingId);
-                        tr.querySelector('td:nth-child(7)').appendChild(removeJsonBtn);
-                    }
-
-                    mappedJsonNode.textContent = event.target.value ? `(${event.target.value})` : '';
-                    mappedJsonNode.style.display = event.target.value ? 'inline' : 'none';
-                    removeJsonBtn.style.display = event.target.value ? 'inline-block' : 'none';
-
-                    const mappingSelect = tr.querySelector('.mapping-select');
-                    if (mappingSelect && mappingSelect.value !== 'json') {
-                        return;
-                    }
-
-                    saveMapping(
-                        mappingId,
-                        'json',
-                        manualInput ? manualInput.value : '',
-                        null,
-                        null,
-                        event.target.value
-                    );
-
-                    updateJsonDropdowns();
-                }
-            });
 
             document.getElementById('schemaFieldsBody').addEventListener('change', function(event) {
                 if (event.target.classList.contains('manual-default') && event.target.tagName === 'SELECT') {
@@ -1968,9 +2077,11 @@ $apiSampleJson = $template['api_sample_json'] ?? '';
                             updateXlsDropdowns();
                         }
 
-                        if (data.success && mappingType === 'json' && jsonNode) {
-                            usedJsonNodesFromDB = usedJsonNodesFromDB.filter(node => node !== jsonNode);
-                            usedJsonNodesFromDB.push(jsonNode);
+                        if (data.success && mappingType === 'json') {
+                            usedJsonNodesFromDB = Array.from(document.querySelectorAll('select.json-nodes'))
+                                .map(select => select.value || select.dataset.currentJson || '')
+                                .filter(Boolean);
+
                             updateJsonDropdowns();
                         }
                     })
@@ -2205,6 +2316,17 @@ $apiSampleJson = $template['api_sample_json'] ?? '';
             }
 
             if (sourceType === 'API' && availableJsonNodes.length) {
+                const rawJson = document.getElementById('apiJsonExample')?.value || '';
+
+                if (rawJson.trim()) {
+                    try {
+                        jsonNodeLabels = {};
+                        flattenJsonNodes(JSON.parse(rawJson));
+                    } catch (e) {
+                        console.warn('Cannot rebuild JSON labels from sample JSON', e);
+                    }
+                }
+
                 updateJsonDropdowns();
             }