The cleanest way to do this is to shut down the server and delete busytime.nsf and let the server rebuild this if your busytime database is corrupted. If you have a clustered setup, you have to shut down the servers in your cluster and delete the clubusy.nsf DB.
An alternative way that may not require server reboots:
- shut down the calconn, sched, and rnrmgr tasks
- delete all documents in the busytime.nsf or clubusy.nsf DBs or just delete the DB after a "dbcache flush"
- restart the calconn, sched, and rnrmgr tasks
- instead of restarting the tasks, you may be able to do "tell sched validate" and "tell rnrmgr validate" from the console