Solution : https://service.sap.com/sap/support/notes/183407 (SAP Service marketplace login required)
Key words : 
key specification field t5w1y-minva truncatedi 2eetw000 key, 000cigi 2eetw000 key field t5itgg-mocig missing, 000cigi 2eetw000 key field t5itge-mocig missing, truncatedi 2eetw000 key field t5itgg-trfar missing, truncatedi 2eetw000 key field t5itgg-trfkz missing, truncatedi 2eetw000 key field t5itgg-cdcig missing, truncatedi 2eetw000 key field t5itge-quali missing, truncatedi 2eetw000 key field t5itge-cdcig missing, 000i 2eetw000 key field t5p2p-igrp missing, truncatedi 2eetw000 key field t5itgc-quali missing
Related Notes : 
       
| 331846 | Table T77WWW_SDOC causing Error in SPAM during upgrade | 
| 313879 | Error message concerning table class during SP import | 
| 179373 | Additional info for upgrade to Rel.4.6B | 
| 97620 | OCS Info: Overview of Important OCS Notes |