phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './why9work_phpbb1/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) VALUES ('11802e8668374cce80f0c46e5ad2ddcf', -1, 1438755760, 1438755760, 'adf53f91', -9, 0)

Line : 158
File : sessions.php