diff --git a/application/WarehouseEShopOrder/WarehouseEShopOrderController.php b/application/WarehouseEShopOrder/WarehouseEShopOrderController.php
index 5a850cde7..b09717d9b 100644
--- a/application/WarehouseEShopOrder/WarehouseEShopOrderController.php
+++ b/application/WarehouseEShopOrder/WarehouseEShopOrderController.php
@@ -5,7 +5,7 @@ class WarehouseEShopOrderController extends TTCrud {
     protected bool $createText = false;
 
     protected array $columns = [['key' => 'id', 'text' => 'ID', 'modal' => false],
-                                ['key' => 'extRef', 'text' => 'Externe Referenz', 'required' => false],
+                                ['key' => 'extRef', 'text' => 'Externe Referenz', 'required' => true],
                                 ['key' => 'status',
                                  'text' => 'Status',
                                  'required' => true,