[Bug 1920626] [NEW] Can't upgrade Ubuntu Budgie 18.04 to Ubuntu Budgie 20.04

[Deadly Effect]

Public bug reported:

Yes I can't upgrade and I don't want to uninstall anything because it is ridiculous (anyone seen Windows force its user to uninstall games and stuff???).
Here is my apt.log.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.42
ProcVersionSignature: Ubuntu 4.15.0-39.42-generic 4.15.18
Uname: Linux 4.15.0-39-generic x86_64
NonfreeKernelModules: lkp_Ubuntu_4_15_0_39_42_generic_51 nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.23
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Budgie:GNOME
Date: Sat Mar 20 17:35:04 2021
InstallationDate: Installed on 2018-07-29 (965 days ago)
InstallationMedia: Ubuntu-Budgie 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2021-03-20 (0 days ago)
VarLogDistupgradeTermlog:

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic dist-upgrade third-party-packages

** Attachment added: "apt.log"
   https://bugs.launchpad.net/bugs/1920626/+attachment/5478518/+files/apt.log

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https://bugs.launchpad.net/bugs/1920626

Title:
  Can't upgrade Ubuntu Budgie 18.04 to Ubuntu Budgie 20.04

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  Yes I can't upgrade and I don't want to uninstall anything because it is ridiculous (anyone seen Windows force its user to uninstall games and stuff???).
  Here is my apt.log.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.42
  ProcVersionSignature: Ubuntu 4.15.0-39.42-generic 4.15.18
  Uname: Linux 4.15.0-39-generic x86_64
  NonfreeKernelModules: lkp_Ubuntu_4_15_0_39_42_generic_51 nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu7.23
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Budgie:GNOME
  Date: Sat Mar 20 17:35:04 2021
  InstallationDate: Installed on 2018-07-29 (965 days ago)
  InstallationMedia: Ubuntu-Budgie 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2021-03-20 (0 days ago)
  VarLogDistupgradeTermlog:

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