New Book Now Cannot Apply Cash Receipts to Older Invoices or Adjustments

Hey guys, serious issue after upgrade. We created a new book and new COA, everything is working fine but having issues with invoices before the change.

We cannot apply cash receipts or apply credit memos to for invoices prior to the change. The Cash (debit) entry is coming through but the credit isn’t. The GL Control code is setup properly but I feel it’s trying to use the prior account number instead of the new.

Please help!