diff --git a/src/Form/MenuItemType.php b/src/Form/MenuItemType.php
index 1e9de67..4d19aab 100644
--- a/src/Form/MenuItemType.php
+++ b/src/Form/MenuItemType.php
@@ -12,26 +12,49 @@ use Symfony\Component\Form\AbstractType;
 use Symfony\Component\Form\FormBuilderInterface;
 use Symfony\Component\OptionsResolver\OptionsResolver;
 
+use function assert;
+
 final class MenuItemType extends AbstractType
 {
     #[Override]
     public function buildForm(FormBuilderInterface $builder, array $options): void
     {
-        $vendor = $options['data']->getFoodVendor();
-        $vendorId = $vendor->getId();
-        $builder
-            ->add('name')
-            ->add('aliasOf', EntityType::class, [
-                'class' => MenuItem::class,
-                'choice_label' => 'name',
-                'query_builder' => static fn(MenuItemRepository $repository): QueryBuilder => $repository
-                    ->createQueryBuilder('m')
+        $item = $options['data'];
+        assert($item instanceof MenuItem); // Ensure it's of the correct type
+        $vendorId = $item->getFoodVendor()?->getId(); // Use safe navigation operator in case FoodVendor is null
+
+        $builder->add('name'); // Basic field
+        $builder->add('aliases', EntityType::class, [
+            'class' => MenuItem::class,
+            'choice_label' => 'name',
+            'multiple' => true,
+            'expanded' => true,
+            'query_builder' => static function (MenuItemRepository $repository) use ($item, $vendorId): QueryBuilder {
+                $qb = $repository->createQueryBuilder('m');
+
+                // Build the main query with a NOT EXISTS constraint
+                $qb
                     ->where('m.foodVendor = :vendorId')
                     ->andWhere('m.deletedAt IS NULL')
+                    ->andWhere('m.id != :id')
+                    ->andWhere(
+                        $qb->expr()
+                            ->notIn(
+                                'm.id',
+                                $repository->createQueryBuilder('m2')
+                                    ->select('m2.id')
+                                    ->where('m2.aliasOf != m.id') // Reference m.id in the inner query
+                                    ->orWhere('m2.aliasOf IS NOT NULL')
+                                    ->getDQL() // The subquery's DQL string
+                            )
+                    )
                     ->orderBy('m.name', 'ASC')
-                    ->setParameter(':vendorId', $vendorId, UlidType::NAME),
-            ])
-        ;
+                    ->setParameter('vendorId', $vendorId, UlidType::NAME) // ULID or appropriate type
+                    ->setParameter('id', $item->getId(), UlidType::NAME); // ULID or appropriate type
+
+                return $qb;
+            },
+        ]);
     }
 
     #[Override]