phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './baikexue/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 ('d8cc58bc32506c79cb2aea350e4ec3ae', -1, 1406838562, 1406838562, '3651ec24', 1, 0, 0)

Line : 198
File : sessions.php