Solution : https://service.sap.com/sap/support/notes/99736 (SAP Service marketplace login required)
Key words : 
dfreg obart konty lfdnr efeld                    fdnam------------------------------------------------------------------------pp2, 001   cobrb-aufnr              caufvd-maufnrpp2, additional key words tkb2c, posting rule manually, overwriting existing entries, entry 'create entries', system table tkb2c, table tkb2c, 002   cobrb-perbzpp2, 003   cobrb-prozsup
Related Notes : 
       
| 200060 | Periodic settlement in the collective order | 
| 157357 | Periodic settlement: order with project reference |