change reservation price

Once the customer has paid and has been invoiced, if there is a problem during the stay and you have to refund part of the amount of the reservation, you have to pay the invoice and make a negative payment.

Then you have to delete the Main Item from the items, and then you can modify the price.

It would be nice if the credit invoices could also be associated to a payment in this case in negative, just like when you invoice, so that you don't have to do it in two steps.

And if we could avoid having to delete the main Item afterwards, it would simplify a lot.

Moltes gracies!