[Bug 723891] Re: package mailman 1:2.1.13-1 failed to install/upgrade: subprocess new pre-installation script returned error exit status 1

[James Page]

Not much in the error log for this one:

(Reading database ... 312026 files and directories currently installed.)
Preparing to replace mailman 1:2.1.13-1 (using .../mailman_1%3a2.1.13-1ubuntu0.2_amd64.deb) ...
 * Stopping Mailman master qrunner mailmanctl
   ...done.
dpkg: error processing /var/cache/apt/archives/mailman_1%3a2.1.13-1ubuntu0.2_amd64.deb (--unpack):
 subprocess new pre-installation script returned error exit status 1

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https://bugs.launchpad.net/bugs/723891

Title:
  package mailman 1:2.1.13-1 failed to install/upgrade: subprocess new
  pre-installation script returned error exit status 1