SAP Message >6812 - Incoming correspondence with due date &1 already exists

Diagnosis
For business partner &V1& and contract object &V2&, you want to createincoming correspondence with periodicity Immediately in yearV4.
Incoming correspondencewith due date &V3& already exists in the correspondence history. Theincoming correspondence has a dunning status that permitscorrespondence dunning.

System Response
No incoming correspondence is created.