When you configure and setup Adagio Bank Rec, you create a BankRec Suspense account. Everyone knows this. That is best practices which we have been training people to do for years.

So correcting this processing error is a slam dunk.

Post the deposit as a misc deposit in AR with the CR to Bank Rec Suspense. Done.
Adjust the vendor overpayment in AP to Bank Rec Suspense. Done. You can reference or document the adjustment in AR and AP, but get it done.

It's how the software was designed to work.

Merry Christmas.
Brian