To clear extra debit memo in AP

Hiya,
The previous AP team created an extra debit memo thinking that that is required to clear out an incorrect PO entry. Anyway, the invoice has been paid correctly and PO adjusted correctly. And now we are left with an extra debit memo in which we have nothing to match it with.

How can we clear this extra debit memo?

Please help.

thanks

Do DM adjustment/write-off to same AP Payable account.