symfony
diff --git a/‎src/Symfony/Component/Form/Extension/Core/EventListener/ResizeFormListener.php
Lines changed: 8 additions & 2 deletions b/‎src/Symfony/Component/Form/Extension/Core/EventListener/ResizeFormListener.php
Lines changed: 8 additions & 2 deletions
diff --git a/‎src/Symfony/Component/Form/Tests/Extension/Core/EventListener/ResizeFormListenerTest.php
Lines changed: 15 additions & 3 deletions b/‎src/Symfony/Component/Form/Tests/Extension/Core/EventListener/ResizeFormListenerTest.php
Lines changed: 15 additions & 3 deletions
diff --git a/‎src/Symfony/Component/Form/composer.json
Lines changed: 0 additions & 1 deletion b/‎src/Symfony/Component/Form/composer.json
Lines changed: 0 additions & 1 deletion
@@ 
8000
-199,7 +199,13 @@ public function onSubmit(FormEvent $event): void
         }
 
         if ($this->keepAsList) {
-            $formReindex = [];
+            $formReindex = $dataKeys = [];
+            foreach ($data as $key => $value) {
+                $dataKeys[] = $key;
+            }
+            foreach ($dataKeys as $key) {
+                unset($data[$key]);
+            }
             foreach ($form as $name => $child) {
                 $formReindex[] = $child;
                 $form->remove($name);
@@ -208,8 +214,8 @@ public function onSubmit(FormEvent $event): void
                 $form->add($index, $this->type, array_replace([
                     'property_path' => '['.$index.']',
                 ], $this->options));
+                $data[] = $child->getData();
             }
-            $data = array_values($data);
         }
 
         $event->setData($data);
 
@@ -11,7 +11,6 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Core\EventListener;
 
-use Doctrine\Common\Collections\ArrayCollection;
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\EventDispatcher\EventDispatcher;
 use Symfony\Component\Form\AbstractType;
@@ -310,11 +309,11 @@ public function testOnSubmitDealsWithObjectBackedIteratorAggregate()
         $this->assertArrayNotHasKey(2, $event->getData());
     }
 
-    public function testOnSubmitDealsWithArrayBackedIteratorAggregate()
+    public function testOnSubmitDealsWithTraversableArrayAccess()
     {
         $this->builder->add($this->getBuilder('1'));
 
-        $data = new ArrayCollection([0 => 'first', 1 => 'second', 2 => 'third']);
+        $data = new \ArrayIterator([0 => 'first', 1 => 'second', 2 => 'third']);
         $event = new FormEvent($this->builder->getForm(), $data);
         $listener = new ResizeFormListener(TextType::class, [], false, true);
         $listener->onSubmit($event);
@@ -323,6 +322,19 @@ public function testOnSubmitDealsWithArrayBackedIteratorAggregate()
         $this->assertArrayNotHasKey(2, $event->getData());
     }
 
+    public function testKeepAsListWorksWithTraversableArrayAccess()
+    {
+        $this->builder->add($this->getBuilder('1'));
+
+        $data = new \ArrayIterator([0 => 'first', 1 => 'second', 2 => 'third']);
+        $event = new FormEvent($this->builder->getForm(), $data);
+        $listener = new ResizeFormListener(TextType::class, keepAsList: true);
+        $listener->onSubmit($event);
+
+        $this->assertArrayNotHasKey(1, $event->getData());
+        $this->assertArrayNotHasKey(2, $event->getData());
+    }
+
     public function testOnSubmitDeleteEmptyNotCompoundEntriesIfAllowDelete()
     {
         $this->builder->setData(['0' => 'first', '1' => 'second']);
 
@@ -27,7 +27,6 @@
         "symfony/service-contracts": "^2.5|^3"
     },
     "require-dev": {
-        "doctrine/collections": "^1.0|^2.0",
         "symfony/validator": "^6.4|^7.0",
         "symfony/dependency-injection": "^6.4|^7.0",
         "symfony/expression-language": "^6.4|^7.0",