Hi Experts,
I have a sales order with one item, the delivery went in parts. I now have to cancel the remaining quantity but everytime I do I got an error message:

When I tried to change the shipping date to a current or future date, I got this message:

Can you please advice on what else I can do in order to solve this issue? The quantity that has been delivered was already invoiced and I cannot cancel the delivery note anymore.
Thanks!