Solution : https://service.sap.com/sap/support/notes/309458 (SAP Service marketplace login required)
Key words : 
additional key words dunning level, contract-related dunning history, solution import add-, dunning end run, dunning procedure manually, dunning level, dunning level = 0, dunning end, dunning procedure, dunning headers
Related Notes : 
       
| 310746 | Collective note SAP Insurance 4.51 - SuppPack 017 | 
| 310744 | Collective note SAP Insurance 4.61 - Add-On SP 003 |