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 ('607475f24f80959646b79c5cebfd36ca', -1, 1411402466, 1411402466, '36ea3b5e', -1, 0, 0)

Line : 187
File : sessions.php