AP batch out of balance

I have an AP batch out of balance. The problem started with an out of balance voucher that was entered with a total higher than the receipts attached. Before this was caught, a check was cut against this unposted batch. It was then noticed that the check amount was too high so the check was voided. I am trying to reverse that voucher from the batch but it won't let me because a check was cut against it. Ifyou know how to fix this error I would greatly appreciate your help.

thank you.