phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO phpbb2_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('051ddd4fd1090c0894dc39ba6ae9fd98', -1, 1582912095, 1582912095, '03e9d95b', -4, 0, 0)

Line : 189
File : sessions.php