Project environment upgrade fails with database error

[anonymous]

I was trying to install the ResourceReservationPlugin on my system running Trac: 0.12.2dev-r10313 MySQL: "5.0.75-0ubuntu10.5", client: "5.0.75", thread-safe: 1

Installation goes fine, I managed to enable the plugin, but failed to upgrade the trac environment:

Trac export/trac/my_project> upgrade use the hashlib module instead resreservation needs to create the db resreservation needs to create the db upgrade_environment resreservation needs to create the db _upgrade_db exception in the database creation OperationalError: (1072, "Key column 'res_from' doesn't exist in table") Trac export/trac/my_project> quit

I checked the database but there were no tables by the name res* .