phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './illustra_phpbb1/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 ('42813fbd5d8fde16d2d9ceb91f326d12', -1, 1406086904, 1406086904, '36e30cdb', -1, 0, 0)

Line : 187
File : sessions.php