Could not obtain topic information

DEBUG MODE

SQL Error : 145 Table './million_forum/phpbb_posts' is marked as crashed and should be repaired

SELECT t.*, u.username, u.user_id, u2.username as user2, u2.user_id as id2, p.post_time, p.post_username FROM phpbb_topics t, phpbb_users u, phpbb_posts p, phpbb_users u2 WHERE t.forum_id = 5 AND t.topic_poster = u.user_id AND p.post_id = t.topic_last_post_id AND p.poster_id = u2.user_id AND t.topic_type = 2 ORDER BY t.topic_last_post_id DESC

Line : 297
File : viewforum.php