diff --git a/packages/admin/src/Filament/Resources/CustomerResource.php b/packages/admin/src/Filament/Resources/CustomerResource.php
index aa97eea5ae..c84b571cba 100644
--- a/packages/admin/src/Filament/Resources/CustomerResource.php
+++ b/packages/admin/src/Filament/Resources/CustomerResource.php
@@ -159,7 +159,13 @@ protected static function getCustomerGroupsFormComponent(): Component
     {
         return Forms\Components\CheckboxList::make('customerGroups')
             ->label(__('lunarpanel::customer.form.customer_groups.label'))
-            ->relationship(name: 'customerGroups', titleAttribute: 'name');
+            ->relationship(
+                name: 'customerGroups',
+                titleAttribute: 'name',
+                modifyQueryUsing: fn (Builder $query) => $query->distinct(
+                    ['id', 'name', 'handle', 'default']
+                )
+            );
     }
 
     protected static function getDefaultTable(Table $table): Table