How to make correction in SAP for payment to wrong vendor but sap transaction is correct?

Hi all,

I’m facing problem in SAP.

All the SAP transaction is correct but we had make wrong transfer to vendor B instead of vendor A, amount USD1000. Unfortunately we no more business with vendor B whereas our sister company have. So, we issue a Debit Note USD 1000 to my sister company and my sister company issue same amount Debit Note to Vendor B also. Then, how we make a correction in SAP since the SAP transaction is correct? Thanks.