diff --git a/app/Admin/Controllers/ProductPartController.php b/app/Admin/Controllers/ProductPartController.php
index 000d74fc..b62ca71d 100644
--- a/app/Admin/Controllers/ProductPartController.php
+++ b/app/Admin/Controllers/ProductPartController.php
@@ -103,9 +103,12 @@ class ProductPartController extends AdminController
         $builder = ProductPart::with(['skus']);
         return Form::make($builder, function (Form $form) {
             $form->display('id');
-            $form->text('key')->rules(function (Form $form) {
-                return 'unique:product_parts,key,'.$form->model()->id.',id';
-            })->required();
+            if ($form->isCreating()) {
+                $form->text('key')->rules(function (Form $form) {
+                    return 'unique:product_parts,key,'.$form->model()->id.',id';
+                })->required();
+            }
+
             $form->text('name');
             // if ($form->isCreating()) {
             $form->multipleSelectTable('skus')