phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './tripleac_Forum/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 ('6509901084f0d4143fb9e6a9feb37577', -1, 1413941593, 1413941593, '36c4775d', -1, 0, 0)

Line : 187
File : sessions.php