SAP Message >4091 - Clearing was undone: Return reason &3 (&4)

Diagnosis
The document contains items whose clearing was retracted, or theclearing document itself was retracted.
The retracted clearing was determined in business partner item &V1&.

System Response
Returns document: &V2&
Returns reason: &V3& &V4&

Procedure
If the item in question is an invoice whose clearing was retracted, youcan use the function Goto -> Payments/Returned items to view thedata on payments, on retracted items, and on returned items. Thisfunction is in the list screen of the business partner items (positioncursor) or in the detail screen of the active business partner item.
If this is a retracted clearing document, you can use the functionEnvironment -> Previously cleared items to display items thatwere previously cleared and are now open again.