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 ('44a469c17d44b61906b958926d76e0d5', -1, 1638583739, 1638583739, '36e361db', 28, 0, 0)

Line : 187
File : sessions.php