fix

src/components/common/schema/Table.js

@@ -315,7 +315,7 @@ class UpdateTableButton extends Component {
                             return 'error';
 
                         let schemaData = data;
-                        let referenceID;
+                        let referenceID = '';
                         if(data.schema_by_id)
                             referenceID = data.schema_by_id.reference;