Hi Vlad,
I believe the change in GR slip can be managed, it is also possible to just write down the container number on the boxes if the boxes are fixed with a pen Image may be NSFW.
Clik here to view.
If the query is catered to, request you to close the thread, with approach which you have decided to take to solve your query.
How to close a discussion and why
Best Regards,
Ameya B.