Hi, 

You can’t do a complete rollback on something that was already rolled back. 

When correcting a payment / rollback, you must decide - do we do a complete rollback or a partial rollback.   A complete rollback affects cash. For example, 100 was reported as being received and matched to an invoice, yet later find the 100 was never actually received. Cash must be affected with a correction.    

A partial rollback does not affect cash, the cash side is moved to what we call a parked payment. The idea is you received cash (for example 100) but that 100 was reported against the wrong customer invoice, you then need to correct.    You then must deal with the parked payment, for example moving that parked payment to another entity or another invoice.  The idea is you still have the 100, it was just posted to the wrong invoice. 

Best regards

Thomas