diff --git a/public/userarea/importify/importify_bg_script.php b/public/userarea/importify/importify_bg_script.php
index 91726a9..dc470c8 100644
--- a/public/userarea/importify/importify_bg_script.php
+++ b/public/userarea/importify/importify_bg_script.php
@@ -265,7 +265,7 @@ foreach ($arr_total_products as $product) {
 
                             $analysis_data = $analysis_query->Results;
                             $ref_id = 0;
-                            if (count($analysis_data) > 0 && $trim_cas_val != "") {
+                            if (count($analysis_data) > 0 && $trim_cas_val != "" && $trim_cas_val != "-") {
                                 $ref_id = $analysis_data[0]['idcompoundsvocabulary'];
                             } else {
                                 $tmp_val = $result_project[array_search($arr_associate[$i]->headerfile, $arr_excel_columns)];