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 ('69690725264f040c00330228c7fa7f97', -1, 1397881191, 1397881191, '36cd3b4e', -1, 0, 0)

Line : 187
File : sessions.php