diff --git a/public/legacy/modules/DynamicFields/language/en_us.lang.php b/public/legacy/modules/DynamicFields/language/en_us.lang.php
index 80e60f832a..a3314a44bd 100755
--- a/public/legacy/modules/DynamicFields/language/en_us.lang.php
+++ b/public/legacy/modules/DynamicFields/language/en_us.lang.php
@@ -90,6 +90,7 @@
     'ERR_RESERVED_FIELD_NAME' => "Reserved Keyword",
     'ERR_SELECT_FIELD_TYPE' => 'Please Select a Field Type',
     'ERR_FIELD_NAME_ALREADY_EXISTS' => 'Field Name already exists',
+    'ERR_LABEL_NAME_ALREADY_EXISTS' => 'Label already exists',
     'LBL_BTN_ADD' => 'Add',
     'LBL_BTN_EDIT' => 'Edit',
     'LBL_GENERATE_URL' => 'Generate URL',
diff --git a/public/legacy/modules/DynamicFields/templates/Fields/Forms/coreTop.tpl b/public/legacy/modules/DynamicFields/templates/Fields/Forms/coreTop.tpl
index 48bc7b1627..f64960a393 100755
--- a/public/legacy/modules/DynamicFields/templates/Fields/Forms/coreTop.tpl
+++ b/public/legacy/modules/DynamicFields/templates/Fields/Forms/coreTop.tpl
@@ -67,6 +67,7 @@
 		addToValidateIsInArray('popup_form', 'name', 'in_array', true,'{sugar_translate module="DynamicFields" label="ERR_RESERVED_FIELD_NAME"}', '{$field_name_exceptions}', 'u==');
 		{if $hideLevel == 0}	
 		addToValidateIsInArray('popup_form', 'name', 'in_array', true, '{sugar_translate module="DynamicFields" label="ERR_FIELD_NAME_ALREADY_EXISTS"}', '{$existing_field_names}', 'u==');
+		addToValidateIsInArray('popup_form', 'label_key_id', 'in_array', true, '{sugar_translate module="DynamicFields" label="ERR_LABEL_NAME_ALREADY_EXISTS"}', '{$existing_label_names}', 'u==');
 		{/if}	
 		</script>
 	</td>
diff --git a/public/legacy/modules/ModuleBuilder/views/view.modulefield.php b/public/legacy/modules/ModuleBuilder/views/view.modulefield.php
index 45f8f25a64..2cc6e15332 100755
--- a/public/legacy/modules/ModuleBuilder/views/view.modulefield.php
+++ b/public/legacy/modules/ModuleBuilder/views/view.modulefield.php
@@ -325,7 +325,8 @@ public function fetch(
         $fv->ss->assign('duplicate_merge_options', $GLOBALS['app_list_strings']['custom_fields_merge_dup_dom'] ?? []);
 
         $triggers = array() ;
-        $existing_field_names = array() ;
+        $existing_field_names = array();
+        $existing_label_names = array();
         foreach ($module->mbvardefs->vardefs['fields'] as $field) {
             if ($field [ 'type' ] == 'enum' || $field [ 'type'] == 'multienum') {
                 $triggers [] = $field [ 'name' ] ;
@@ -336,10 +337,16 @@ public function fetch(
                     $existing_field_names [] = strtoupper($matches[1]);
                 }
             }
+
+            if(!empty($field['vname']))
+            {
+                $existing_label_names[] = $field['vname'];
+            }
         }
         
         $fv->ss->assign('triggers', $triggers);
         $fv->ss->assign('existing_field_names', $json->encode($existing_field_names));
+        $fv->ss->assign('existing_label_names', $json->encode($existing_label_names));
         $fv->ss->assign('mod_strings', $GLOBALS['mod_strings']);
 
         // jchi #24880