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 `first`=1' at line 1
select `pid` from forum_post where `tid`= and `first`=1

PHP Debug

No.FileLineCode
1forum.php63runhooks()
2source/function/function_core.php1118hookscript(%s, %s, %s, Array, %s, %s)
3source/function/function_core.php1165call_user_func(Array, Array)
4plugin_yulun_readtime_forum->viewthread_postheader(Array)
5source/plugin/yulun_readtime/readtime.class.php22discuz_database::result_first(%s)
6source/class/discuz/discuz_database.php120discuz_database::query(%s, Array, false, false)
7source/class/discuz/discuz_database.php139db_driver_mysql->query(%s, false, false)
8source/class/db/db_driver_mysql.php152db_driver_mysql->halt(%s, %d, %s)
9source/class/db/db_driver_mysql.php223break()
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