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 ('d3acc81716a50cea0f1ab829d98a6670', -1, 1714028049, 1714028049, '127784df', 0, 0, 0)

Line : 187
File : sessions.php