Solution : https://service.sap.com/sap/support/notes/886783 (SAP Service marketplace login required)
Key words : 
mv /oracle/<dbsid>/920_64 /oracle/<dbsid>/920_64_orig, mv /oracle/client/92x_64 /oracle/client/92x_64_orig, cp /oracle<dbsid>/920_64_orig/network/admin/, ora /oracle/<dbsid>/920_64/network/admin4, database patches -> oracle -> oracle 32-bit -> oracle 9, database patches -> oracle -> oracle 64-bit -> oracle 9, mkdir /oracle/<dbsid>/920_64, cd /oracle/<dbsid>/920_64, /oracle/<dbsid>/920_64/lib, /oracle/<dbsid>/920_64/jdbc
Related Notes : 
       
| 967915 | ORA-3106 possible on 9.2.0.7 | 
| 964783 | Updating Oracle client on host with multiple SAP systems | 
| 952388 | Kernel <= 6.40:UNIX error due to 9i Client software | 
| 938986 | Oracle Database 9.2: Patches for 9.2.0 | 
| 871096 | Oracle 10.2.0: Patches/patch collections for Oracle 10.2.0.2 | 
| 836517 | Oracle database 10g: Preparation for SAP upgrade | 
| 539921 | Current patch set for Oracle 9.2.0 | 
| 521230 | FAQ: Client software 9i or lower on UNIX |