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 ('dd47878c3ffe4d3025389782082c7580', -1, 1418891510, 1418891510, '36e288b3', -1, 0, 0)

Line : 187
File : sessions.php