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 ('7d05f06127ed7b0bc2a928122d09e859', -1, 1438561465, 1438561465, '36904fc8', 0, 0, 0)

Line : 189
File : sessions.php