modules/ticket/back/models/sale.js

@@ -148,8 +148,7 @@ module.exports = Self => {
                 relation: 'saleOriginal'
             }
         });
-
-        return saleCloned2.saleOriginal()?.ticketFk;
+        return saleCloned2?.saleOriginal()?.ticketFk || null;
     };
 };