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 ('56b5660fc8fa27310032ffc1e66e8b8e', -1, 1430831895, 1430831895, '36cca224', -1, 0, 0)

Line : 187
File : sessions.php