Ubuntu 18.04.3에서 Nginx를 설치할 수 없습니다.

Ubuntu 18.04.3에서 Nginx를 설치할 수 없습니다.

저는 서버 설정을 처음 접했는데 Digitalocean의 Ubuntu 18.04.3(LTS) x64 서버에 nginx를 설치할 수 없는 것 같습니다. 다른 항목을 읽어보았지만 어떤 솔루션도 나에게 적합하지 않은 것 같습니다. 제거하고 다시 설치해 보았으나 항상 같은 응답을 받았습니다.

sudo apt-get install nginx
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 nginx : Depends: nginx-core (< 1.14.0-0ubuntu1.7.1~) but it is not going to be installed or
                  nginx-full (< 1.14.0-0ubuntu1.7.1~) but it is not going to be installed or
                  nginx-light (< 1.14.0-0ubuntu1.7.1~) but it is not going to be installed or
                  nginx-extras (< 1.14.0-0ubuntu1.7.1~) but it is not going to be installed
         Depends: nginx-core (>= 1.14.0-0ubuntu1.7) but it is not going to be installed or
                  nginx-full (>= 1.14.0-0ubuntu1.7) but it is not going to be installed or
                  nginx-light (>= 1.14.0-0ubuntu1.7) but it is not going to be installed or
                  nginx-extras (>= 1.14.0-0ubuntu1.7) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

어떤 도움이라도 대단히 감사하겠습니다!

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