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 t.article_status =1 and t.aid < 0 and a.wid = 4 order by aid desc limit 1' at line 1
SELECT t.* FROM portal_article_title t left join portal_article_city_assoc a on t.aid = a.aid WHERE t.section_id = and t.article_status =1 and t.aid < 0 and a.wid = 4 order by aid desc limit 1

PHP Debug

No.FileLineCode
1/home/yibada.com/www/portal.php11require_once(%s)
2/home/yibada.com/www/config/env.php50require_once(%s)
3portal.php73require_once(%s)
4source/module/portal/portal_view.php32table_portal_article_title->connect_pre_next(%s, %d, %s, %s)
5source/class/table/table_portal_article_title.php405discuz_database::fetch_all(%s)
6source/class/discuz/discuz_database.php86discuz_database::query(%s, Array, false, false)
7source/class/discuz/discuz_database.php127db_driver_mysqli->query(%s, false, false)
8source/class/db/db_driver_mysqli.php121db_driver_mysqli->halt(%s, %d, %s)
9source/class/db/db_driver_mysqli.php187break()
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