package libmono-system-configuration4.0-cil (not installed) failed to install/upgrade: tentata sovrascrittura di "/usr/lib/mono/gac/System.Configuration/4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll" presente anche nel pacchetto mono-core 3.2.3-1

I'm not able to install the mono-complete package on my precise.

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: libmono-system-configuration4.0-cil (not installed)
ProcVersionSignature: Ubuntu 3.13.0-36.63~precise1-generic 3.13.11.6
Uname: Linux 3.13.0-36-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.7
Architecture: amd64
Date: Fri Oct 3 08:47:30 2014
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-precise-amd64-20130203-1
DuplicateSignature: package:libmono-system-configuration4.0-cil:(not installed):tentata sovrascrittura di "/usr/lib/mono/gac/System.Configuration/4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll" presente anche nel pacchetto mono-core 3.2.3-1
ErrorMessage: tentata sovrascrittura di "/usr/lib/mono/gac/System.Configuration/4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll" presente anche nel pacchetto mono-core 3.2.3-1
InstallationMedia: Ubuntu 12.04 "Precise" - Build amd64 LIVE Binary 20130203-13:50
MarkForUpload: True
SourcePackage: mono
Title: package libmono-system-configuration4.0-cil (not installed) failed to install/upgrade: tentata sovrascrittura di "/usr/lib/mono/gac/System.Configuration/4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll" presente anche nel pacchetto mono-core 3.2.3-1
UpgradeStatus: No upgrade log present (probably fresh install)