phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('5217a4d855c0382331dc4b8f1b0a253e', -1, 1603841169, 1603841169, '22eacf64', 91, 0, 0)

Line : 172
File : sessions.php