phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a9bfa2c9d1559473dc40d51405215018' for key 1

INSERT INTO phpbb_zsessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('a9bfa2c9d1559473dc40d51405215018', -1, 1713581611, 1713581611, '340e554c', -2, 0, 0)

Line : 187
File : sessions.php