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 ('efb77c66d89d441b80c3f7e306f25f3f', -1, 1406242724, 1406242724, '36eb05b2', -1, 0, 0)

Line : 187
File : sessions.php