Quantity zero in credit memo

Dears Experts,

I have the following question / problem.

I am creating a credit memo request with reference to a invoice, but in the credit memo request I need to have the quantity in zero because the credit memo is created for incorrect pricing (it is no a return) but the system brings the quantity from the invoice.

This is incorrect. I need to have zero quantity in the credit memo request independently that the invoice that I am using as reference has quantity.

I suspects that there is something in the copy control to controls this but I don’t find it.

I Hill reward if it is helpful.

Thanks in advance!