phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './usr_web420_1/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 ('b2adaefa1cc346246c2d8776a0f8d09c', -1, 1406740215, 1406740215, '36cd77a3', -1, 0, 0)

Line : 187
File : sessions.php