phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 144 Table './forum/phpbb_sessions' is marked as crashed and last (automatic?) repair failed

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('e2cfde20089d8b49072a12d46b4d3de6', -1, 1410852427, 1410852427, '3659e951', -1, 0, 0)

Line : 187
File : sessions.php