It is not sufficient to just disable the "Other software" as you will
still have package version from other repositories, like the deadsnakes
PPA, which may provide package versions greater than the release to
which you are upgrading. Subsequently, you'll need to reenable the other
software sources
** Summary changed:
- Cannot upgrade to ubuntu 22.04 from ubuntu 20.04.
+ Cannot upgrade to ubuntu 21.10 from ubuntu 20.04.
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https://bugs.launchpad.net/bugs/1970018
Title:
Cannot upgr