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 ('3b8cfb3cb8376234dcb574f13f72913d', -1, 1406100612, 1406100612, '36cdbd9c', 3, 0, 0)

Line : 187
File : sessions.php