某些操作出错什么原因

Discuz! Database Error(1146) Table 'a0422135218.forum_threadpreview' doesn't existDELETE FROM forum_threadpreview WHERE `tid` IN('8527','8524','8523')

PHP Debug

No.	File	Line	Code
1	admin.php	57	require(%s)
2	source/admincp/admincp_members.php	420	deletethread(Array)
3	source/function/function_delete.php	430	table_forum_threadpreview->delete_by_tid(Array)
4	source/class/table/table_forum_threadpreview.php	28	discuz_database::delete(%s, %s)
5	source/class/discuz/discuz_database.php	48	discuz_database::query(%s, %s)
6	source/class/discuz/discuz_database.php	136	db_driver_mysql->query(%s, false, true)
7	source/class/db/db_driver_mysql.php	151	db_driver_mysql->halt(%s, %d, %s)
8	source/class/db/db_driver_mysql.php	218	break()