package libmng2:amd64 (not installed) failed to install/upgrade: package libmng2:amd64 is not ready for configuration cannot configure (current status 'config-files')

[lucian]

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ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: libmng2:amd64 (not installed)
ProcVersionSignature: Ubuntu 4.4.0-38.57-generic 4.4.19
Uname: Linux 4.4.0-38-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
Date: Sun Sep 25 01:16:23 2016
DuplicateSignature:
 package:libmng2:amd64:(not installed)
 Setting up python-sip (4.17+dfsg-1build1) ...
 dpkg: error processing package libmng2:amd64 (--configure):
  package libmng2:amd64 is not ready for configuration
ErrorMessage: package libmng2:amd64 is not ready for configuration cannot configure (current status 'config-files')
InstallationDate: Installed on 2016-02-25 (212 days ago)
InstallationMedia: Ubuntu 14.04.4 LTS "Trusty Tahr" - Release amd64 (20160217.1)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.12~ubuntu16.04.1
SourcePackage: libmng
Title: package libmng2:amd64 (not installed) failed to install/upgrade: package libmng2:amd64 is not ready for configuration cannot configure (current status 'config-files')
UpgradeStatus: Upgraded to xenial on 2016-09-24 (0 days ago)