Don't allow to set negative quantity if transaction is not return entry

[rohitwaghchaure]

Added validation if user set the negative quantity

[gbard]

Is there an option to deactivate this? We are used to process item exchange by creating a Sales Invoice with negative quantities for items returned and positive quantities for items that are exchanged for the returned items (on the same Sales Invoice), Ex: Item A | Qty: -1 | Amount -9.99$ > Item B | Qty: 1 | Amount 9.99$ > TOTAL: 0$.

[vcavel]

This check bothers us a lot as well.

We sell beers in returnable containers and this check makes it very difficult to do so ! It is not practical to create a credit note every time !