package maas-rack-controller 2.1.3+bzr5573-0ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

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:)

ProblemType: Package
DistroRelease: Ubuntu 17.04
Package: maas-rack-controller 2.1.3+bzr5573-0ubuntu1
ProcVersionSignature: Ubuntu 4.9.0-11.12-generic 4.9.0
Uname: Linux 4.9.0-11-generic x86_64
ApportVersion: 2.20.4-0ubuntu1
Architecture: amd64
Date: Sat Dec 31 09:37:40 2016
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2016-02-11 (323 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
PackageArchitecture: all
RelatedPackageVersions:
 dpkg 1.18.10ubuntu1
 apt 1.4~beta2
SourcePackage: maas
Title: package maas-rack-controller 2.1.3+bzr5573-0ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)