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 ('cff704f17f77048c2f272069f9b9e33a', -1, 1747473359, 1747473359, '03934f44', -2, 0, 0)

Line : 189
File : sessions.php