phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './private_phpb1/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 ('b4aad185568b5c2f5003f5a71d23e88e', -1, 1411351809, 1411351809, '36c5ab6d', 9, 0, 0)

Line : 187
File : sessions.php