Solution : https://service.sap.com/sap/support/notes/353861 (SAP Service marketplace login required)
Key words : 
target release erp2004 sr1, request               sapk46cxd1   execute xpra, active plan version correctly, active plan version, xpra report          rpu46cx_central_person, record - plogi plogi, record plogi plogi, entry plogi plogi, /3 hr support package 06, comparison report rpupcp00
Related Notes : 
       
| 390062 | Additional information about upgrading to 4.6C SR2 | 
| 373038 | Organizational Management: data missing after upgrade | 
| 327285 | Additions to upgrade to 4.6C SR1 | 
| 320425 | Incorrect name for central person | 
| 317722 | Upgrade information for table T77S0 | 
| 192949 | Additional info for upgrade to 4.6C | 
| 48184 | Upgrade: Stopping a running R3up or SAPup |