Migration v4 : "Impossible de mettre à jour tous les paquets" / "Can't update all packages"

ii  libssl-dev:amd64                      1.1.1j-1+0~20210301.25+debian9~1.gbp2578a0                              amd64        Secure Sockets Layer toolkit - development files
ii  libssl-doc                            1.1.1j-1+0~20210301.25+debian9~1.gbp2578a0                              all          Secure Sockets Layer toolkit - development documentation
ii  libssl1.0.2:amd64                     1.0.2u-1~deb9u4                                                         amd64        Secure Sockets Layer toolkit - shared libraries
ii  libssl1.1:amd64                       1.1.1j-1+0~20210301.25+debian9~1.gbp2578a0                              amd64        Secure Sockets Layer toolkit - shared libraries
libssl1.1:
  Installed: 1.1.1j-1+0~20210301.25+debian9~1.gbp2578a0
  Candidate: 1.1.1d-0+deb10u5
  Version table:
 *** 1.1.1j-1+0~20210301.25+debian9~1.gbp2578a0 100
        100 /var/lib/dpkg/status
     1.1.1d-0+deb10u5 1000
        500 http://security.debian.org/debian-security buster/updates/main amd64 Packages
     1.1.1d-0+deb10u4 1000
        500 http://ftp.debian.org/debian buster/main amd64 Packages

C’est bien ce que tu demandais ?