[root@koji ~]# /usr/sbin/koji-sweep-db --no-vacuum
No handlers could be found for logger "koji.db"
Traceback (most recent call last):
  File "/usr/sbin/koji-sweep-db", line 88, in <module>
    clean_reservations(cursor, options.vacuum)
  File "/usr/sbin/koji-sweep-db", line 29, in clean_reservations
    cursor.execute("DELETE " + q)
  File "/usr/lib/python2.7/site-packages/koji/db.py", line 136, in execute
    ret = self.cursor.execute(operation, parameters)
psycopg2.ProgrammingError: column "create_time" does not exist
LINE 1: DELETE  FROM build_reservations WHERE create_time < now() - ...
                                              ^