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 ('a5d84151d85e1f8fcf2cc6cf0e38257b', -1, 1397748430, 1397748430, '36e305ea', 1, 0, 0)

Line : 189
File : sessions.php