Teamcity 7 thinks I have 2 instances trying to attach to the oracle DB

No matter how many times I try to start up TC it thinks I have 2 instances trying to access the DB. Which TC table can I clear so it allows me to start up TC?

[2012-03-21 17:02:42,070]   INFO - ide.db.TeamCityDatabaseManager - Attempt to capture TeamCity DB lock (java thread 28, starting code 1558100652, attempt 1)
[2012-03-21 17:02:45,255]   INFO - ide.db.TeamCityDatabaseManager - The TeamCity DB lock is not captured (java thread 28, starting code 1558100652, attempt 1)