Brief
We have updated the file 'order_items.php' for version 3.6.
 
Description
Predefined serial numbers were not restored when deleting an order if a serial number was long or contained some letters.
 
Solution
We would recommend you to download an updated version of the file from here:
http://www.viart.com/downloads/order_items-3.6.zip
 
Further, extract the above mentioned file into the 'includes' folder of your shop in the Binary mode. Do not forget to make a backup copy of the current file in case something goes wrong.