Solution : https://service.sap.com/sap/support/notes/104115 (SAP Service marketplace login required)
Key words : 
additional key words cluster table konv, online service system note 90922, start transaction se11 andsteps, automatically includedin structures konv, phase pcon_31hthe oil fields, table                          action item, se11 - remove fields, se11 - add fields, -oil-specific note, avoid converting konv
Related Notes : 
       
| 135705 | IS-Oil KONV database conversion | 
| 97061 | IS-OIL Service Pack 1, 3.1H 1.0D/2.0D | 
| 90922 | Restarting pool/cluster conversions | 
| 85746 | Additional Info: IS-Oil Upgrade/Installation 3.1H |