Solution : https://service.sap.com/sap/support/notes/819830 (SAP Service marketplace login required)
Key words : 
dbua reports stale optimizer statistics, pre-upgrade utility log file, documentation -> database upgrades -> oraclecorrections / additions, general post-upgrade recommendations, performing post-upgrade tasks, 5 performing post-upgrade steps, performing post-upgrade steps, import pre-defined statistics, documentation -> database upgrades -> oracleupgrade, database upgrade program automatically
Related Notes : 
       
| 1122956 | ORA-24006: cannot create QUEUE | 
| 1113270 | 10g: "ThrtReadDBVersion: Db version overflow" w/ SAP start | 
| 1020260 | Delivery of Oracle statistics (Oracle 10g, 11g) | 
| 1004290 | C-Compiler as an installation requirement for Oracle 10.2 | 
| 986578 | Oracle support in Itanium 2 systems (Montecito & following) | 
| 900522 | Incorrect alerts/warnings in database check for Oracle 10g | 
| 871096 | Oracle 10.2.0: Patches/patch collections for Oracle 10.2.0.2 | 
| 841728 | 10.2: Solutions for installation and upgrade problems | 
| 836517 | Oracle database 10g: Preparation for SAP upgrade | 
| 832893 | Oracle release check in DbSl | 
| 830576 | Parameter recommendations for Oracle 10g | 
| 669902 | Setting the national character set to UTF8 |