Solution : https://service.sap.com/sap/support/notes/503002 (SAP Service marketplace login required)
Key words : 
symptom bdoc message processing, middleware reorganization report smo6_reorg, bdoc message reorganisation, attached correction instructions, affected crm server, create report rsmw0_clean_table_new, execute report rsmw0_clean_table_new, relevant support package, bdoc messages, reorganization runs
Related Notes : 
       
| 675725 | Unnecessary BDocs in SRM (EBP) from queue CSA_MASS_BUPA | 
| 536414 | CRM 3.0/3.1 SAP Composite Note: Middleware reorganization | 
| 494901 | SAPKU30008: Support Package 8 for EBP 3.0/CRM 3.0 | 
| 487915 | BDoc message flow tables are not reorganized | 
| 206439 | Reorganization of tables in CRM Middleware |