Add check for empty vehicle subscriptions in collected order invoices processing

services/nginx/app/objects/collected_order_invoices_o.php

@@ -895,6 +895,11 @@ class collected_order_invoices_o extends db
             ];
         }
 
+        // Check if there are any vehicle subscriptions
+        if (empty($vehicle_array)) {
+            return;
+        }
+
         // Create the vehicle subscriptions transaction
         $transaction = new orders_o();
         $transaction->add(