MyBB SQL Error

MyBB has experienced an internal SQL error and cannot continue.

SQL Error:
1104 - The SELECT would examine more than MAX_JOIN_SIZE rows; check your WHERE and use SET SQL_BIG_SELECTS=1 or SET SQL_MAX_JOIN_SIZE=# if the SELECT is okay
Query:
SELECT t.tid, t.title, t.sid, t.template FROM mybb_templates t LEFT JOIN mybb_templatesets s ON (t.sid=s.sid) LEFT JOIN mybb_templates t2 ON (t.title=t2.title AND t2.sid='1') WHERE t.title = 'showthread_quickreply' AND NOT (t.sid = -2 AND NOT ISNULL(t2.tid)) ORDER BY t.title ASC