[Mailman-Users] Error updating mailman Ubuntu 14.04.3

[Stephen J. Turnbull]

billy noah writes:

 > Downgrade detected, from version 0x20112f1 to version 0x20110f0
 > This is probably not safe.

The basic answer is "You're going to need help from Ubuntu experts
anyway because the package database is out of sync with reality, so go
ask them."

That said, there are three possibilities.

1. Ubuntu screwed up.  Ubuntu will fix it.  If you're in a big hurry,
   ask in Ubuntu forums how to work around until they do.

2. You installed a more recent version of Mailman yourself

   a.  From a PPA.  Talk to Ubuntu about how to manage these.

   b.  From source.  Tell us what you did.  We can help you get
       Mailman running, but your package DB is still broken, you need
       to talk to Ubuntu about how to fix that.

3. Something else.  Tell us about it.  (The package DB is still
   broken, Ubuntu forums are probably the right place to learn how to
   fix that.)

 > Exiting.
 > dpkg: error processing package mailman (--configure):

You should be able to roll back the update at this point.  Check the
docs for apt or whatever front-end you're using.

Then, until you get things figured out, you could pin Mailman to the
current version (that Ubuntu thinks is installed) and run the rest of
any pending updates.