User reversed a vendor invoice to a wrong month.
For example, Vendor Invoice created in October, and have to reversed in October, but the user reversed into November.
As you know, we can not reverse a reversal document in SAP. We can resolve this problem with the following workaround:
1) Create a Vendor Invoice in November.
2) Reverse the Invoice created in step 1 into October.
With this posting, the GRIR and the AP account will be corrected.
Invoice A – Credit AP, Debit GRIR
Reversal of Invoice B – Credit GRIR, Debit AP
Reversal of Invoice A – Credit GRIR, Debit AP
Invoice B – Credit AP, Debit GRIR