Problem seems to be with python-is-python2 / python-minimal:
2020-10-03 08:28:12,888 INFO installing python-is-python2 because python-minimal was installed
2020-10-03 08:28:12,889 DEBUG Installing 'python-is-python2' (python-minimal was installed on the system)
2020-10-03 08:28:42,073 ERROR Dist-upgrade failed: 'E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.'
Looks like a duplicate of Bug #1875523 and Bug #1875599.
Problem seems to be with python-is-python2 / python-minimal:
2020-10-03 08:28:12,888 INFO installing python-is-python2 because python-minimal was installed ver::Resolve generated breaks, this may be caused by held packages.'
2020-10-03 08:28:12,889 DEBUG Installing 'python-is-python2' (python-minimal was installed on the system)
2020-10-03 08:28:42,073 ERROR Dist-upgrade failed: 'E:Error, pkgProblemResol