SAP Message >3324 - Reversal not possible; there is a later dunning notice not reversed

trados = docu -> fi -> fica Diagnosis You have tried to reverse a dunning notice for an item for which thereis at least one later dunning notice that has not been reversed. The item is the item with the document number &V1&(OPBEL/OPUPW/OPUPK/OPUPZ)in a dunning notice of the business partner &V2& with run ID &V3& &V4&. System Response The dunning notice is not reversed. Procedure First reverse the later dunning notices.