apt upgrade fails due to existing symlink

[Søren Weber]

When doing "apt full-upgrade" it fails because the symbolic link: "/var/www/html/mythweb/mythweb -> /usr/share/mythtv/mythweb/" already exists.
If I delete the symbolic link "/var/www/html/mythweb/mythweb" and do an "apt full-upgrade" again it works and creates the above link.
Next time it fails again because the link is (of course!) there.

I would expect that it would check if there is a link and handle it gracefully (e.g. overwrite).
Btw this issue has been there for a long time, I just didn't report it until now (because I thought it would go away).

# lsb_release -rd
Description: Ubuntu 16.04.3 LTS
Release: 16.04

# apt-cache policy mythweb
mythweb:
  Installeret: 2:0.28.2+fixes.20180202.8238e83-0ubuntu0mythbuntu1
  Kandidat: 2:0.28.2+fixes.20180202.8238e83-0ubuntu0mythbuntu1
  Versionstabel:
 *** 2:0.28.2+fixes.20180202.8238e83-0ubuntu0mythbuntu1 500
        500 http://ppa.launchpad.net/mythbuntu/0.28/ubuntu xenial/main amd64 Packages
        500 http://ppa.launchpad.net/mythbuntu/0.28/ubuntu xenial/main i386 Packages
        100 /var/lib/dpkg/status
     2:0.28.1+fixes.20180131.3b6c6d1-0ubuntu0mythbuntu1 500
        500 http://ppa.launchpad.net/mythbuntu/0.28/ubuntu xenial/main amd64 Packages
        500 http://ppa.launchpad.net/mythbuntu/0.28/ubuntu xenial/main i386 Packages
     2:0.28.0+fixes.20160413.15cf421-0ubuntu2.16.04.1 500
        500 http://dk.archive.ubuntu.com/ubuntu xenial-updates/multiverse amd64 Packages
        500 http://dk.archive.ubuntu.com/ubuntu xenial-updates/multiverse i386 Packages
     2:0.28.0+fixes.20160413.15cf421-0ubuntu2 500
        500 http://dk.archive.ubuntu.com/ubuntu xenial/multiverse amd64 Packages
        500 http://dk.archive.ubuntu.com/ubuntu xenial/multiverse i386 Packages