package fglrx-updates-core (not installed) failed to install/upgrade: trying to overwrite '/etc/acpi/fglrx-powermode.sh', which is also in package fglrx-updates 2:13.350.1-0ubuntu2

during xubuntu update 15th 04 2015

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: fglrx-updates-core (not installed)
ProcVersionSignature: Ubuntu 3.11.0-13.20-generic 3.11.6
Uname: Linux 3.11.0-13-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.14.1-0ubuntu3.8
Architecture: amd64
Date: Wed Apr 15 09:53:21 2015
DuplicateSignature: package:fglrx-updates-core:(not installed):trying to overwrite '/etc/acpi/fglrx-powermode.sh', which is also in package fglrx-updates 2:13.350.1-0ubuntu2
ErrorMessage: trying to overwrite '/etc/acpi/fglrx-powermode.sh', which is also in package fglrx-updates 2:13.350.1-0ubuntu2
InstallationDate: Installed on 2013-11-19 (511 days ago)
InstallationMedia: Xubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016)
SourcePackage: fglrx-installer-updates
Title: package fglrx-updates-core (not installed) failed to install/upgrade: trying to overwrite '/etc/acpi/fglrx-powermode.sh', which is also in package fglrx-updates 2:13.350.1-0ubuntu2
UpgradeStatus: Upgraded to trusty on 2014-04-24 (356 days ago)