Discuz! Database Error

(1064) You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') AND attachment > 0 order by heats desc' at line 1

SELECT * FROM forum_thread WHERE displayorder = 0 AND fid in () AND attachment > 0 order by heats desc

PHP Debug

No.	File	Line	Code
1	plugin.php	47	include(%s)
2	source/plugin/cack_bestposts/cack_bestposts.inc.php	65	discuz_database::fetch_all()
3	source/class/discuz/discuz_database.php	106	discuz_database::query()
4	source/class/discuz/discuz_database.php	142	db_driver_mysqli->query()
5	source/class/db/db_driver_mysqli.php	148	db_driver_mysqli->halt()
6	source/class/db/db_driver_mysqli.php	223	break()

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