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 ('12857b90044538ec321f940ad6f6b4ff', -1, 1748910486, 1748910486, '0d3bad1e', -4, 0, 0)

Line : 190
File : sessions.php