V1523 SAP messsage during order creation after copy control from returns to sales

Hi all,

I have copied to OR to new order OR2, to apply copy control from returns to OR2.

it has nothing to do with credit memo but message displays : Credit memos already exist for item 000010: 5

tried to check setting with schedule lines but can't find where it caused from.

Can I have any ideas for why this message is getting from?

Regards,