Hello, I can not finish one manufacturing order - when click "Mark as done" get info   You need to supply a Lot/Serial number for product. 

Problem is that all work order for this MO are finished, so I can not edit the serial number (it is empty, I dont know how it happend, because on second Work Order user must select serial number) 

So I can not mark as done MO because there is no serial number, and I can not set up serial number because WO are done.