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 ('64c97750a8610caab839ea3c5b3aa545', -1, 1714165166, 1714165166, '12bdb44c', -7, 0, 0)

Line : 187
File : sessions.php