diff --git a/application/WarehouseEShopOrder/WarehouseEShopOrderModel.php b/application/WarehouseEShopOrder/WarehouseEShopOrderModel.php
index 32db2b2ae..015463f73 100644
--- a/application/WarehouseEShopOrder/WarehouseEShopOrderModel.php
+++ b/application/WarehouseEShopOrder/WarehouseEShopOrderModel.php
@@ -14,14 +14,14 @@
 
 class WarehouseEShopOrderModel extends TTCrudBaseModel {
     public int $id;
-    public string $extRef;
+    public ?string $extRef;
     public string $status;
     public string $deliveryMode;
     public string $deliveryAddressName;
     public string $deliveryAddressLine;
     public string $deliveryAddressPLZ;
     public string $deliveryAddressCity;
-    public string $trackingNumber;
+    public ?string $trackingNumber;
     public int $create;
     public int $createBy;
 }
\ No newline at end of file