Index: /mods/wpsg_mod_export.class.php
===================================================================
--- /mods/wpsg_mod_export.class.php	(revision 8218)
+++ /mods/wpsg_mod_export.class.php	(revision 8221)
@@ -1883,8 +1883,6 @@
 	            $oOrder = wpsg_order::getInstance($o_id);
 				
-				$order = [
-					'id' => $oOrder->getId(),
-					'custom_data' => unserialize($oOrder->__get('custom_data'))
-				];
+                $order = $oOrder->data;
+                $order['custom_data'] = unserialize($oOrder->__get('custom_data'));
 
                 if ($this->shop->hasMod('wpsg_mod_rechnungen')) {