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 ('d67e390706f9a2c83c15c9c9214aff78', -1, 1714051734, 1714051734, '03951af6', -4, 0, 0)

Line : 187
File : sessions.php