데비안 9.3에 php7.0-mbstring을 설치하는 방법

php7.0-mbstring을 설치할 수 없습니다:

다음 패키지에는 충족되지 않은 종속성이 있습니다: php7.0-mbstring : 종속성: php7.0-common (= 7.0.19-1)이지만 7.0.20-1~dotdeb+8.2 설치 E: 문제를 해결할 수 없습니다. 손상된 패키지.

소스.목록:

deb http://debian.man.ac.uk/debian/ stretch main deb-src http://debian.man.ac.uk/debian/ stretch main

deb http://security.debian.org/ stretch/updates main contrib deb-src http://security.debian.org/ stretch/updates main contrib

deb http://ftp.at.debian.org/debian/ stretch-updates main contrib non-free deb-src http://ftp.at.debian.org/debian/ stretch-updates main contrib non-free

deb http://download.webmin.com/download/repository sarge contrib

apt-cache policy산출:

Package files:
 100 /var/lib/dpkg/status
     release a=now
 500 http://download.webmin.com/download/repository sarge/contrib amd64 Packages
     release v=3.1,o=Jamie Cameron,a=stable,n=sarge,l=Webmin,c=contrib,b=amd64
     origin download.webmin.com
 500 http://ftp.at.debian.org/debian stretch-updates/main amd64 Packages
     release o=Debian,a=stable-updates,n=stretch-updates,l=Debian,c=main,b=amd64
     origin ftp.at.debian.org
 500 http://security.debian.org stretch/updates/contrib amd64 Packages
     release v=9,o=Debian,a=stable,n=stretch,l=Debian-Security,c=contrib,b=amd64
     origin security.debian.org
 500 http://security.debian.org stretch/updates/main amd64 Packages
     release v=9,o=Debian,a=stable,n=stretch,l=Debian-Security,c=main,b=amd64
     origin security.debian.org
 500 http://debian.man.ac.uk/debian stretch/main amd64 Packages
     release v=9.3,o=Debian,a=stable,n=stretch,l=Debian,c=main,b=amd64
     origin debian.man.ac.uk

apt-cache policy php7.0-common산출:

  Installed: 7.0.20-1~dotdeb+8.2
  Candidate: 7.0.20-1~dotdeb+8.2
  Version table:
  *** 7.0.20-1~dotdeb+8.2 100
        100 /var/lib/dpkg/status
      7.0.19-1 500
        500 http://debian.man.ac.uk/debian stretch/main amd64 Packages