우분투에 가상 상자를 설치하려고 했는데 이제 터미널에서 많은 일을 할 수 없습니다

Question

E: Conflicting values set for option Signed-By regarding source https://download.virtualbox.org/virtualbox/debian/ focal: /usr/share/keyrings/oracle-virtualbox-2016.gpg != 
E: The list of sources could not be read.
E: Conflicting values set for option Signed-By regarding source https://download.virtualbox.org/virtualbox/debian/ focal: /usr/share/keyrings/oracle-virtualbox-2016.gpg != 
E: The list of sources could not be read.