phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('3e70912671adf8b9deb99f4b8abd1d59', -1, 1409596207, 1409596207, '6b1598c6', -1, 0, 0)

Line : 187
File : sessions.php