How to fix doubled A/P Reserve Invoice?

Hi,

I have a problem with my inventory. The Item Master Data of an item indicates that there is outstanding PO. But when warehouse staff checked it, he found that all his orders were received already.

I checked further then I found a couple of strange transactions. Apparently, purchasing staff created a PO then copied it to A/P Reserve Invoice. The A/P Reserve Invoice then was copied to Goods Receipt PO. However, there was a mistake with the A/P Reserve Invoice so he/she made a new one to revise it (without creating new PO). Using this new A/P Invoice, finance staff issued Outgoing Payment based on second A/P Reserve Invoice.

So, now the status of PO is Closed, first A/P Reserve Invoice is Delivered, Goods Receipt PO is Closed, and second A/P Reserve invoice is Paid. I don't know how to solve this because I might get entangled if I commit a transaction to fix this problem.

Do you have any idea?

Thanks.