[Bug 862651] Re: package mysql-server-5.1 (not installed) failed to install/upgrade: subprocess new pre-installation script returned error exit status 1

[Robie Basak]

>From the attached logs:

Unpacking mysql-server-5.1 (from .../mysql-server-5.1_5.1.58-1ubuntu1_amd64.deb) ...
Aborting downgrade from (at least) 5.5 to 5.1.
If are sure you want to downgrade to 5.1, remove the file
/var/lib/mysql/debian-*.flag and try installing again.
dpkg: error processing /var/cache/apt/archives/mysql-server-5.1_5.1.58-1ubuntu1_amd64.deb (--unpack):
 subprocess new pre-installation script returned error exit status 1

It looks like you've had a future version of mysql-server installed in
the past, and you're now trying to install an older version (although
current for 11.10).

If this is correct, then could please you clean up the custom
installation from the future manually and try again? If this works,
please mark this bug as Invalid.

If this is wrong, could you please tell us the history of your mysql-
server installation on this server?

** Changed in: mysql-5.1 (Ubuntu)
       Status: New => Incomplete

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Title:
  package mysql-server-5.1 (not installed) failed to install/upgrade:
  subprocess new pre-installation script returned error exit status 1

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