how to know the user ID who reversed payment against a standalone A/P voucher

Hi All,

There's a standalone A/P voucher (I do not see a purchase order against it in supplier ledger inquiry).

A payment was made and document type PN created.

Then it was reversed resulting in creation of document type PO.

Business has requested for user ID who reversed the payment PN resulting in creation of document PO.

I can see details of both PN and PO when I search with batch number in F0911 but I see only the PN type in F0411.

We are using JDE 9.1

Kindly advise on the table(s) where I can see this information i.e. who made the reversal.