Is there a way to "pay" credits that will never be net against debit vouchers?

We have a number of credits in PS Payables that will never clear from AP Trade as they will not be net against vouchers. For example, the supplier invoice was paid by a direct debit to our bank account and not via a pay cycle in PS. We are looking for a way to pay out the credits and not resort to closing the credit vouchers and then making journal entries. I was not successful in trying to record a manual payment to a credit (cannot pay a voucher less than 0)