Ошибка обновления с Ubuntu 18.04 LTS до 20.04 LTS: - Перед обновлением установите все доступные обновления для вашего выпуска.

Я хочу обновить Ubuntu 18.04 LTS до Ubuntu 20.04 LTS, поэтому я выполнил следующую команду

      sudo do-release-upgrade -d -f DistUpgradeViewGtk3
Checking for a new Ubuntu release
Please install all available updates for your release before upgrading.

Затем я выполнил следующую команду для обновления пакетов.

      sudo apt update

Hit:1 http://in.archive.ubuntu.com/ubuntu bionic InRelease
Hit:2 http://in.archive.ubuntu.com/ubuntu bionic-updates InRelease             
Hit:3 http://in.archive.ubuntu.com/ubuntu bionic-backports InRelease           
Hit:4 http://in.archive.ubuntu.com/ubuntu bionic-security InRelease            
Hit:5 http://dl.google.com/linux/chrome/deb stable InRelease                   
Hit:6 http://archive.canonical.com/ubuntu bionic InRelease            
Reading package lists... Done                      
Building dependency tree       
Reading state information... Done
3 packages can be upgraded. Run 'apt list --upgradable' to see them.


apt list --upgradable

Listing... Done
gdb/bionic-updates 8.1.1-0ubuntu1 amd64 [upgradable from: 7.11.1-0ubuntu1~16.5]
gir1.2-peas-1.0/bionic 1.22.0-2 amd64 [upgradable from: 1.16.0-1ubuntu2]
libpeas-1.0-0/bionic 1.22.0-2 amd64 [upgradable from: 1.16.0-1ubuntu2]


sudo apt upgrade -y

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
  gdb gir1.2-peas-1.0 libpeas-1.0-0
0 upgraded, 0 newly installed, 0 to remove and 3 not upgraded.

Эти 3 пакета не были обновлены gdb gir1.2-peas-1.0 libpeas-1.0-0, что мешало мне обновиться, поэтому я попробовал эти команды

      sudo apt install gir1.2-peas-1.0

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:
 gir1.2-peas-1.0 : Depends: libpeas-1.0-0 (>= 1.18.0) but 1.16.0-1ubuntu2 is to be installed


sudo apt install libpeas-1.0-0

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:
 libpeas-1.0-0 : Depends: libpython3.6 (>= 3.6.4~rc1) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.


sudo apt install gdb
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:
 gdb : Depends: libpython3.6 (>= 3.6.5) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.



sudo apt-mark hold

E: No packages found


sudo apt full-upgrade

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
  gdb gir1.2-peas-1.0 libpeas-1.0-0
0 upgraded, 0 newly installed, 0 to remove and 3 not upgraded.


sudo apt-cache policy gdb
gdb:
  Installed: 7.11.1-0ubuntu1~16.5
  Candidate: 8.1.1-0ubuntu1
  Version table:
     8.1.1-0ubuntu1 500
        500 http://in.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
     8.1-0ubuntu3 500
        500 http://in.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
 *** 7.11.1-0ubuntu1~16.5 100
        100 /var/lib/dpkg/status



sudo apt-cache policy libpeas-1.0-0

libpeas-1.0-0:
  Installed: 1.16.0-1ubuntu2
  Candidate: 1.22.0-2
  Version table:
     1.22.0-2 500
        500 http://in.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
 *** 1.16.0-1ubuntu2 100
        100 /var/lib/dpkg/status



sudo apt-cache policy gir1.2-peas-1.0

gir1.2-peas-1.0:
  Installed: 1.16.0-1ubuntu2
  Candidate: 1.22.0-2
  Version table:
     1.22.0-2 500
        500 http://in.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
 *** 1.16.0-1ubuntu2 100
        100 /var/lib/dpkg/status

Пожалуйста, помогите мне !