From time to time I have to make an invoice correction for price of products, not quantity.

Every invoice affects sale order lines - even if i dont want to correct the quantity.

Example:

1. Sale order for 100 pcs of "product" for price 10 euro

2. Invoice for 100 pcs of "product" for price 10 euro

3. For some reason (for example customer complain) I want to make an invoice correction so invoice is ofr 100 pcs of "product" but for price 9 euro

How can I do it?

When I post an correction sale order line shows that qty_invoiced = 0 which is not right.

I am using Odoo v13

Thanks!