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 ('750b9374d5e6a2769b5091d0548d0e15', -1, 1713280831, 1713280831, '03850cac', 0, 0, 0)

Line : 187
File : sessions.php