[otrs] Help please

Hi All I have received this error message and I have some users can not login and some Does any one know what to do with this? Got error 134 from table handler, SQL: 'SELECT st.queue_id, sq.name, min(st.create_time_unix), count(*) as count FROM ticket as st, queue as sq, group_user as sug, ticket_state tsd, ticket_lock_type slt WHERE st.ticket_state_id = tsd.id AND st.queue_id = sq.id AND st.ticket_lock_id = slt.id AND sq.group_id = sug.group_id AND tsd.name in ( 'open', 'new', 'pending auto close-', 'pending auto close+', 'pending reminder' ) AND slt.name in ( 'unlock', 'tmp_lock' ) AND sug.user_id = 15[...] Joe