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 ('dc991ea335a5bd089e262bd5cde9ff29', -1, 1714029564, 1714029564, '0387cae0', -4, 0, 0)

Line : 187
File : sessions.php