Are you restoring a backup from a previous version of Mango into a newer version? That's what it looks like. To do that, you would have to follow the instructions for doing the restore on the command line, so that Mango can follow its normal upgrade procedure during startup. The "eventDetectors" table which is missing was created in Upgrade12, which was released long ago.
You'll want to move your existing mah2.h2.db file before doing the command line restore, for safe keeping.