debian 9, apt-get install php7.3, 손상된 패키지가 있습니까?

Debian 9에 php7.3과 nginx를 설치하려고 합니다.

"손상된 패키지를 보유하고 있습니다"란 무엇을 의미하며 어떻게 해결합니까?

이것이 내가 본 것입니다 (이후 sudo su -)

root@vps149861:/etc/apt# apt-get update
Ign:1 http://deb.debian.org/debian stretch InRelease
Hit:2 http://deb.debian.org/debian stretch-updates InRelease  
Hit:3 http://deb.debian.org/debian stretch Release                       
Hit:4 http://security.debian.org stretch/updates InRelease               
Hit:5 https://deb.nodesource.com/node_8.x stretch InRelease
Hit:7 https://packages.sury.org/php stretch InRelease
Reading package lists... Done

root@vps149861:/etc/apt# apt-get upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

root@vps149861:/etc/apt# apt-get dist-upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

root@vps149861:/etc/apt# apt-get install php7.3
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:
 php7.3 : Depends: libapache2-mod-php7.3 but it is not going to be installed or
                   php7.3-fpm but it is not going to be installed or
                   php7.3-cgi but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

나는 또한 그것을 사용한 적이 없거나 apt-mark이 상황에서 유용할지 모르지만 다음과 같이 말합니다.

E: No packages found
root@vps149861:/etc/apt# apt-mark showhold
root@vps149861:/etc/apt# 

또한 요청 시:

root@vps149861:/etc/apt# dpkg -l | grep ^h
root@vps149861:/etc/apt# 

그리고 이 -f옵션은 나에게도 도움이 되지 않습니다...

root@vps149861:/etc/apt# apt-get install -f
Reading package lists... Done
Building dependency tree       
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.