package opensc (not installed) failed to install/upgrade: tentata sovrascrittura di "/etc/opensc/opensc.conf" presente anche nel pacchetto libopensc2 0.12.0-1~corp1~maverick1

I faced the error following the guide published at:
http://www.crs.lombardia.it/ds/ccurl/537/296/Manuale%20per%20l'installazione%20e%20la%20configurazione%20del%20Software%20CRS%20per%20Linux%2064bit%20v1.1.pdf

Installation of opensc fails if libopensc2 is installed and it runs smoothly when the latter isn't.
Although libopensc2 is not automatically selected by the package manager (synaptic) it seems from the guide that it is recommended, hence why I tried to install it.

I would say severity of this issue is rather low because it's about installing a specific software that is required in only one region of Italy.

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: opensc (not installed)
ProcVersionSignature: Ubuntu 3.13.0-43.72-generic 3.13.11.11
Uname: Linux 3.13.0-43-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.6
Architecture: amd64
Date: Wed Dec 17 08:21:43 2014
DuplicateSignature: package:opensc:(not installed):tentata sovrascrittura di "/etc/opensc/opensc.conf" presente anche nel pacchetto libopensc2 0.12.0-1~corp1~maverick1
ErrorMessage: tentata sovrascrittura di "/etc/opensc/opensc.conf" presente anche nel pacchetto libopensc2 0.12.0-1~corp1~maverick1
InstallationDate: Installed on 2014-12-10 (6 days ago)
InstallationMedia: Ubuntu-GNOME 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
SourcePackage: opensc
Title: package opensc (not installed) failed to install/upgrade: tentata sovrascrittura di "/etc/opensc/opensc.conf" presente anche nel pacchetto libopensc2 0.12.0-1~corp1~maverick1
UpgradeStatus: No upgrade log present (probably fresh install)