diff --git a/src/Service/BookingEditDraftService.php b/src/Service/BookingEditDraftService.php
index 036ac1d..a5c63a6 100644
--- a/src/Service/BookingEditDraftService.php
+++ b/src/Service/BookingEditDraftService.php
@@ -62,10 +62,17 @@ class BookingEditDraftService
         $travelDate = $bookingDto->travel->dateFrom;
         $existingDraft = $this->findDraft($user, $bookingId);
 
+        $bookingNumber = $bookingDto->booking?->bookingNumber;
+
         if (null !== $existingDraft) {
             $existingDraft->setFormData($formData);
+
+            if (null === $existingDraft->getBookingNumber() && null !== $bookingNumber) {
+                $existingDraft->setBookingNumber($bookingNumber);
+            }
         } else {
             $draft = new BookingEditDraft($user, $bookingId, $travelDate, $formData);
+            $draft->setBookingNumber($bookingNumber);
             $this->entityManager->persist($draft);
         }