Upgrade Failed

[williamgurumayum]

Hello,
I am having a problem, this problem is found in many threads on the forum but none of them worked.
I am running Joomla 1.5.26 and CIVI 2.2.9. I am trying to Upgrade CIVI to a state where it is supported by J1.5.
When i run the Database Upgrade Script after installing 3.00 i got the following error
"Database check failed - it looks like you have already upgraded to the latest version (v3.0.alpha2) of the database."
The database i am using is a clean database.
I am out of wits, what shall i do?

Help please

[williamgurumayum]

BUMP.. Please anyone!!

[mathieu]

To summarize discussions on IRC: it's possible that the database had been already upgraded to a 3.x version and failed, but the tables from a partial upgrade were still in the database.

Code: [Select]

09:54 < bgm> when you restored the state of your civicrm DB to 2.2.9, did you drop all tables already in the DB?
09:55 < bgm> or, is it possible that before you worked on the upgrade, someone else had already tried to upgrade civi?
09:56 < bgm> the civi upgrade will check various things to make sure that the db integrity is good, notably checking the
             version in `civicrm_domain`, but also checking specific things in the DB to make sure that it's not running
             a same upgrade twice (ex: check for specific tables/columns)
09:57 < bgm> if you comfortable with php, the code is in CRM/Upgrade/Incremental/  and from there, it usually runs the
             php/ code, which includes sql files from sql/*.sql
09:58 < bgm> (although 3.0 has upgrade code in CRM/Upgrade/ThreeZero, CRM/Upgrade/ThreeOne, then after that it
             was moved to Incremental/)