phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './private_phpb1/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 ('8aa11629bf06ad2f0f58e711cc4294bf', -1, 1406674424, 1406674424, '36e33fc3', 12, 0, 0)

Line : 187
File : sessions.php