Solution : https://service.sap.com/sap/support/notes/737448 (SAP Service marketplace login required)
Key words :
system administration -> support -> portal content directory -> pcd administration, click 'release cache', 0 sp2 patch 4 hotfix 5, 0 sp4 patch 4, transport package, option 'overwrite, cached objects, overwrite reason, program error, import mechanism
Related Notes :
| 723778 | EP 6.0 SP4 Patches |
| 588913 | Central note for Import and Export for EP 6.0 |