fix: ensure unique services mapping when creating api payload

src/Service/BookingEditDraftService.php

@@ -461,10 +461,12 @@ class BookingEditDraftService
     private function resolveServiceArray(array $serviceIds, array $services): array
     {
         $resolved = [];
+        $addedIds = [];
 
         foreach ($serviceIds as $serviceId) {
-            if (isset($services[$serviceId])) {
+            if (isset($services[$serviceId]) && false === isset($addedIds[$serviceId])) {
                 $resolved[] = $services[$serviceId];
+                $addedIds[$serviceId] = true;
             }
         }