Solution : https://service.sap.com/sap/support/notes/601965 (SAP Service marketplace login required)
Key words : 
inventory file    <path>/orainventory/contents/oneoffsn, symptom original oracle alert text, prerequisites versions affectedoracle universal installer, inventory corruptionoriginal oracle note, oracle > oracle 64-bit > oracle 9, 0  oracle > oracle 32-bit > oracle 9, installing oracle9i database release 2, applying multiple interim patches, occurrenceif multiple interim patches, oracle universal installer
Related Notes : 
       
| 640910 | Problems when using OPatch | 
| 578131 | Releasing Oracle 9.2 for older SAP versions | 
| 540021 | Add. information on migrating/updating to Oracle 9.2.0: UNIX | 
| 496227 | INST: SAP Web AS 6.20 on Windows - Oracle |