Hi,
I have done the upgrade from 2.5 SP 3 to 4.0 SP2
When i was doing the axdbupgrade (3.0 -> 4.0) I always make sure that during the installation of database server, file server & aos , u do not check the run aos when finished install. That's mean it should be blank database.
I'm not familiar with the error message but, i think when upgrade to 5.0, it would be the same.
Cheers
David S