Delete payments made in a ticket?

is there any way to delete a payment in the settle screen? for example three people want to pay one ticket, they all go to the cashier, one gives a 20 note, the other a 50 note and the last a 10 note, but in the las minute the one who gave a 20 notes changes his mind and gives exact change or different note or decides to pay with credit card…

as strange as it sounds… all those scenarios are real ones in my pizza place… strange people, jajajajjaajjjajaja