PeopleSoft 9.1 Receipt Accrual

We have a purchase order which has been received and is picking up in the receipt accrual.  The receipt is valid but AP didn't use the PO when entering the voucher and the voucher has been paid. We need the receipt to show matched so it doesn't pick up in the receipt accrual and we need the PO closed so it can't be used. Does anyone know how to close the PO without the need to cancel the receipt first?  Since we did actually receive the goods, it doesn't seem right that we should cancel the receipt.