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 ('f8c989fe9cfdde3466837f446a11c2a6', -1, 1713880194, 1713880194, '0380c758', -10, 0, 0)

Line : 187
File : sessions.php