Goods Receipt and Invoice Receipt

Hi Experts,

We have a scenario wherein Goods Receipt posting was done on a cancelled PO (PO line items are marked for deletion) instead of the correct PO. PO was created on July 2015.  Goods Receipt and Invoice Receipt are posted on August 2015.  Payment document was already cleared and Payment was already received by the Vendor last 2015. 

Is it still advisable or possible to reverse the GR and IR even if it was posted on a closed Fiscal Year? We would just like to correct the system records where GR and IR have been posted to PO#2 instead of PO#1.

Thanks.