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 ('85549b26f7b16000917fbf031baa3dfa', -1, 1409216693, 1409216693, '36512b97', -1, 0, 0)

Line : 187
File : sessions.php