Can't upgrade from 18 to 20

[dan]

Just try to upgrade from 18 to 20 and it failed. I can see in the logs it fail after it can't calculate python-dbg.

I did not install much on this machine.

I found similar bug but it's marked as closed. My laptop is up to date(18.04) but still fail.

upgrade from 18.04 to 20.04 fails to calculate if python-dbg is installed
Bug #1887544

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.41
ProcVersionSignature: Ubuntu 4.15.0-126.129-generic 4.15.18
Uname: Linux 4.15.0-126-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.20
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Tue Dec 8 14:48:28 2020
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2020-12-08 (0 days ago)
VarLogDistupgradeTermlog:

[Brian Murray (brian-murray)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1886748, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.