phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'phpbb_sessions.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 ('fa2323f932d1827f7be4f1c2ab5df73e', -1, 1664242369, 1664242369, '12d0bb80', -7, 0, 0)

Line : 187
File : sessions.php