fix add prodcut bug

backend/product/admin.py

@@ -225,8 +225,6 @@ class ProductVariantInLine(ProductVariantInlineAdminPermission, StackedInline):
             kwargs['widget'] = UnfoldAdminColorInputWidget()
         return super().formfield_for_dbfield(db_field, request, **kwargs)
     
-    def has_add_permission(self, request):
-        return True
 
 from unfold.contrib.filters.admin import RelatedDropdownFilter
 @admin.register(ProductVariant)

backend/product/permissions.py

@@ -105,6 +105,9 @@ class ProductVariantAdminPermission:
 
 class ProductVariantInlineAdminPermission:
     
+    def has_add_permission(self, request, obj):
+        return True
+
     def has_change_permission(self, request, obj=None):
         if request.user.is_superuser or obj == None:
             return True