[Bug 1860330] Re: After upgrading from Eoan to Focal, I receive the error: "A newer version of Thunderbird may have made changes to your profile which are no longer compatible with this older version. Use this profile only with that newer version, or create a new profile for this installation of Thunderbird. Creating a new profile requires setting up your accounts, calendars and add-ons again."

[Iain Lane]

*** This bug is a duplicate of bug 1851936 ***
    https://bugs.launchpad.net/bugs/1851936

Cheers. Saviq found this earlier, and Olivier (Thunderbird maintainer)
suggested to use bug #1851936 to track the problem. Firefox had the same
issue recently, and he fixed it there - probably the same fix needs to
be applied to Thunderbird too. It's being worked on :-).

I'll mark this bug as a duplicate.

** This bug has been marked a duplicate of bug 1851936
   User profile won't load after upgrade - prompt to create new profile

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Title:
  After upgrading from Eoan to Focal, I receive the error: "A newer
  version of Thunderbird may have made changes to your profile which are
  no longer compatible with this older version. Use this profile only
  with that newer version, or create a new profile for this installation
  of Thunderbird. Creating a new profile requires setting up your
  accounts, calendars and add-ons again."

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