MyBB has experienced an internal SQL error and cannot continue.

SQL 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 ') ORDER BY p.dateline' at line 4

Query:

SELECT u.*, u.username AS userusername, p.* FROM mybb_posts p LEFT JOIN mybb_users u ON (u.uid=p.uid) WHERE p.pid IN () ORDER BY p.dateline

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