JDE E1 9.2 - how to close unmatched purchase order receipts in F43121

The client has not used voucher match to close out PO Receipts but has used standalone vouchers to pay the suppliers. The vouchers are not logged so that Redistribute to PO is not an option either. The old closed purchase orders only have Match Type 1 records in the F43121 and no Match Type 2. Is there a way to close the F43121 without creating duplicate vouchers in the Supplier Ledger? I have found the suggestion to set the voucher amount to zero when matching the old open receipts, but this would create voucher match variance bookings.

Many thanks.