phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './u29121/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 ('561b1be0338e2f7f90ffc0633f66b84a', -1, 1464329956, 1464329956, '3650b2ac', -4, 0, 0)

Line : 187
File : sessions.php