diff --git a/src/Controller/Booking/CreateStep2Controller.php b/src/Controller/Booking/CreateStep2Controller.php
index f4cd34b..a375bd5 100644
--- a/src/Controller/Booking/CreateStep2Controller.php
+++ b/src/Controller/Booking/CreateStep2Controller.php
@@ -69,7 +69,8 @@ class CreateStep2Controller extends AbstractController
     }
 
     /**
-     * Handles HTMX requests for dynamic form updates when room selections change.
+     * Handles HTMX requests for dynamic form updates when room selections change by submitting the form
+     * without validation and returning a freshly rendered instance.
      */
     #[Route('/bookings/create/participants/refresh', name: 'app_booking_create_step_2_refresh', methods: ['POST'])]
     public function refreshParticipantForm(Request $request): Response
@@ -84,8 +85,6 @@ class CreateStep2Controller extends AbstractController
 
         $form->handleRequest($request);
 
-        $this->bookingService->saveBookingCreateDto($request, $bookingCreateDto);
-
         return $this->renderBlock('booking/create_step_2.html.twig', 'participants_form', [
             'form' => $form->createView(),
         ]);
diff --git a/src/Form/BookingCreateStep2Type.php b/src/Form/BookingCreateStep2Type.php
index 0e5baed..c3c5d6b 100644
--- a/src/Form/BookingCreateStep2Type.php
+++ b/src/Form/BookingCreateStep2Type.php
@@ -22,16 +22,12 @@ class BookingCreateStep2Type extends AbstractType
 
     public function onPreSetData(FormEvent $event): void
     {
-        /** @var BookingCreateDto $bookingCreateDto */
-        $bookingCreateDto = $event->getData();
+        /** @var BookingCreateDto $data */
+        $data = $event->getData();
         $form = $event->getForm();
 
-        if (null === $bookingCreateDto) {
-            return;
-        }
-
-        $adapter = new ParticipantDataAdapter($bookingCreateDto->participants);
-        $roomChoices = $this->generateRoomChoices($adapter, $bookingCreateDto->getSelectedRooms());
+        $adapter = new ParticipantDataAdapter($data->participants);
+        $roomChoices = $this->generateRoomChoices($adapter, $data->getSelectedRooms());
         $this->addParticipantsField($form, $roomChoices);
     }