$ sudo add-apt-repository -r ppa:gnome3-team/gnome3

 Before upgrading your system to a new Ubuntu release (i.e. from Ubuntu 16.04 to 16.10), you should run 'ppa-purge ppa:gnome3-team/gnome3' first.

*** You need to run 'sudo apt-get dist-upgrade' to avoid problems. ***
Please read the output before entering 'Y' to make sure important packages won't be removed.

=== Bugs ===
Please use 'ubuntu-bug' to report bugs against packages in this PPA

=== End of Life ===
This PPA is no longer updated for releases older than Ubuntu 18.04 LTS. If you are using an older release, please ppa-purge this PPA and consider upgrading to a newer Ubuntu release.
Unless otherwise posted, updates will only be provided in this PPA for 7 months from the original release of the associated Ubuntu series.
https://lists.ubuntu.com/archives/ubuntu-gnome/2017-March/004229.html
 More info: https://launchpad.net/~gnome3-team/+archive/ubuntu/gnome3
Press [ENTER] to continue or Ctrl-c to cancel removing it.

---

$ sudo apt-get update

Hit:1 http://ppa.launchpad.net/lutris-team/lutris/ubuntu focal InRelease
Hit:2 http://dl.google.com/linux/chrome/deb stable InRelease
Get:3 http://security.ubuntu.com/ubuntu focal-security InRelease [107 kB]
Hit:4 http://ppa.launchpad.net/team-xbmc/ppa/ubuntu focal InRelease
Hit:5 http://de.archive.ubuntu.com/ubuntu focal InRelease
Hit:6 http://de.archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:7 http://de.archive.ubuntu.com/ubuntu focal-backports InRelease
Get:8 http://security.ubuntu.com/ubuntu focal-security/main amd64 DEP-11 Metadata [18,6 kB]
Get:9 http://security.ubuntu.com/ubuntu focal-security/universe amd64 DEP-11 Metadata [31,6 kB]
Hit:10 https://packagecloud.io/slacktechnologies/slack/debian jessie InRelease
Fetched 157 kB in 2s (93,0 kB/s)
Reading package lists... Done

---

$ sudo apt-get install wine32

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.
 wine32:i386 : Depends: libwine:i386 (= 5.0-3ubuntu1) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

---

sudo apt-get update

Hit:1 http://dl.google.com/linux/chrome/deb stable InRelease
Hit:2 http://security.ubuntu.com/ubuntu focal-security InRelease
Hit:3 http://ppa.launchpad.net/lutris-team/lutris/ubuntu focal InRelease
Hit:4 http://de.archive.ubuntu.com/ubuntu focal InRelease
Hit:5 http://ppa.launchpad.net/team-xbmc/ppa/ubuntu focal InRelease
Hit:6 http://de.archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:7 http://de.archive.ubuntu.com/ubuntu focal-backports InRelease
Hit:8 https://packagecloud.io/slacktechnologies/slack/debian jessie InRelease
Reading package lists... Done