... Trac database upgrade . ... After restarting, Trac should show the instances which need a manual upgrade via the automated upgrade scripts to ease the pain. These scripts are run via trac-admin : trac-admin /path/to/projenv upgrade . ... A known issue in some versions of PySqlite (2.5.2-2.5.4) prevents the trac-admin upgrade script from successfully upgrading the database format. ... For upgrades from versions older than Trac 0.10, refer first to тАЛ wiki:0.10/TracUpgrade#SpecificVersions . ...