Solution : https://service.sap.com/sap/support/notes/527271 (SAP Service marketplace login required)
Key words : 
component bc-upg-ocs, 'imported support packages' directory, incorrect support package level, support package level corrected, support package level 0000, support package level, 6c support release 2, 6c support release 1, spam/saint updates, implement note corrections
Related Notes : 
       
| 451215 | Note Assistant Version 1.1: Important notes | 
| 423364 | Additional info about installing Banking 4.63 / CFM 2.0 | 
| 390062 | Additional information about upgrading to 4.6C SR2 | 
| 368313 | Additional Info: IS-Oil / IS-Mine Installation 4.6C | 
| 327285 | Additions to upgrade to 4.6C SR1 | 
| 208509 | Error in upgrade phase PATCH_STATUS |