When returning a Delivery order, I want to have the ability to cancel it, so as to cancel the sale order related to it. and have a real clean data information.

After it has been returned, the stock moves of the deliery order returned still in done state, so the sale order always thinks that it's not returned. So it won't never give the option  to cancel a sale order, for that, that's why I want to cancel the returned delivery order.

Any suggestions please ?