phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1194 Table '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 ('4b35e15639aa1d7ae3fd38bc0baf6be3', -1, 1408793036, 1408793036, '36e0e156', -1, 0, 0)

Line : 172
File : sessions.php