menhu.ca - Database Error

(126) Incorrect key file for table '/tmp/#sql_df6_0.MYI'; try to repair it

SELECT DISTINCT t.*, ti.attachment as attachmenturl, ti.remote FROM `forum_thread` t INNER JOIN `forum_threadimage` ti ON t.tid=ti.tid WHERE t.readperm='0' AND t.special IN ('0') AND t.isgroup='0' AND t.displayorder>='0' ORDER BY t.lastpost DESC LIMIT 0,4;

PHP Debug

No.	File	Line	Code
1	portal.php	32	require_once(%s)
2	source/module/portal/portal_index.php	32	include_once(%s)
3	data/template/19_diy_portal_index.tpl.php	11	include(%s)
4	data/template/19_19_common_footer.tpl.php	130	output()
5	source/function/function_core.php	1035	block_updatecache(%s)
6	source/function/function_block.php	237	block_thread->getdata(Array, Array)
7	source/class/block/forum/block_thread.php	362	discuz_database::query(%s)
8	source/class/discuz/discuz_database.php	137	db_driver_mysql->query(%s, false, false)
9	source/class/db/db_driver_mysql.php	152	db_driver_mysql->halt(%s, %d, %s)
10	source/class/db/db_driver_mysql.php	223	break()

Discuz! Database Error