This is the last part of main.log: 2020-11-05 22:10:12,844 DEBUG quirks: running PreDistUpgradeCache 2020-11-05 22:10:12,844 DEBUG running Quirks.PreDistUpgradeCache 2020-11-05 22:10:12,844 INFO checking for python-dbg 2020-11-05 22:10:12,844 INFO installing python2-dbg because python-dbg was installed 2020-11-05 22:10:12,844 DEBUG Installing 'python2-dbg' (python-dbg was installed on the system) 2020-11-05 22:10:13,143 ERROR Dist-upgrade failed: 'E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.' 2020-11-05 22:10:13,145 DEBUG abort called 2020-11-05 22:10:13,147 DEBUG openCache() 2020-11-05 22:10:17,895 DEBUG Comparing 5.4.0-51 with 2020-11-05 22:10:17,896 DEBUG Comparing 5.4.0-52 with 5.4.0-51 2020-11-05 22:10:18,367 DEBUG /openCache(), new cache size 100218
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