phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO phpbb5_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('98920b4119b2f88b4a2aaa409134e663', -1, 1664637164, 1664637164, '12d0bb80', -8, 0, 0)

Line : 187
File : sessions.php