package quagga 0.99.20.1-0ubuntu0.12.04.2 failed to install/upgrade: subprocess new pre-removal script returned error exit status 1

The package upgrade fails.

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: quagga 0.99.20.1-0ubuntu0.12.04.2
ProcVersionSignature: Ubuntu 3.2.0-32.51-generic 3.2.30
Uname: Linux 3.2.0-32-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu14
Architecture: amd64
Date: Tue Nov 6 09:58:36 2012
ErrorMessage: subprocess new pre-removal script returned error exit status 1
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
SourcePackage: quagga
Title: package quagga 0.99.20.1-0ubuntu0.12.04.2 failed to install/upgrade: subprocess new pre-removal script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.quagga.daemons: 2012-09-06T11:40:43.680708