package libx11-dev 2:1.6.3-1ubuntu2 [modified: usr/include/X11/Xcms.h usr/include/X11/Xlibint.h usr/include/X11/Xlocale.h usr/include/X11/Xregion.h usr/include/X11/Xutil.h] failed to install/upgrade: trying to overwrite shared '/usr/include/X11/Xcms.h', which is different from other instances of package libx11-dev:i386

I don't know

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: libx11-dev 2:1.6.3-1ubuntu2 [modified: usr/include/X11/Xcms.h usr/include/X11/Xlibint.h usr/include/X11/Xlocale.h usr/include/X11/Xregion.h usr/include/X11/Xutil.h]
ProcVersionSignature: Ubuntu 4.4.0-59.80-generic 4.4.35
Uname: Linux 4.4.0-59-generic x86_64
NonfreeKernelModules: wl
.tmp.unity_support_test.0:

ApportVersion: 2.20.1-0ubuntu2.4
AptOrdering:
 libx11-dev: Install
 libx11-dev: Configure
 libx11-dev: Configure
 NULL: ConfigurePending
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
Date: Mon Sep 25 22:30:49 2017
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
DkmsStatus:
 bcmwl, 6.30.223.248+bdcom, 4.4.0-36-generic, x86_64: installed
 bcmwl, 6.30.223.248+bdcom, 4.4.0-59-generic, x86_64: installed (WARNING! Diff between built and installed module!)
 broadcom-sta, 6.30.223.271, 4.4.0-59-generic, x86_64: installed
DpkgHistoryLog:
 Start-Date: 2017-09-25 22:30:48
 Commandline: apt-get -f install
 Requested-By: adrien (1000)
 Upgrade: libx11-dev:i386 (2:1.4.99.1-0ubuntu2.3, 2:1.6.3-1ubuntu2)
DpkgLog:
 2017-09-25 22:30:48 startup archives unpack
 2017-09-25 22:30:49 upgrade libx11-dev:i386 2:1.4.99.1-0ubuntu2.3 2:1.6.3-1ubuntu2
 2017-09-25 22:30:49 status half-installed libx11-dev:i386 2:1.4.99.1-0ubuntu2.3
 2017-09-25 22:30:49 status unpacked libx11-dev:i386 2:1.4.99.1-0ubuntu2.3
DpkgTerminalLog:
 Preparing to unpack .../libx11-dev_2%3a1.6.3-1ubuntu2_i386.deb ...
 Unpacking libx11-dev:i386 (2:1.6.3-1ubuntu2) over (2:1.4.99.1-0ubuntu2.3) ...
 dpkg: error processing archive /var/cache/apt/archives/libx11-dev_2%3a1.6.3-1ubuntu2_i386.deb (--unpack):
  trying to overwrite shared '/usr/include/X11/Xcms.h', which is different from other instances of package libx11-dev:i386
DuplicateSignature:
 package:libx11-dev:2:1.6.3-1ubuntu2 [modified: usr/include/X11/Xcms.h usr/include/X11/Xlibint.h usr/include/X11/Xlocale.h usr/include/X11/Xregion.h usr/include/X11/Xutil.h]
 Unpacking libx11-dev:i386 (2:1.6.3-1ubuntu2) over (2:1.4.99.1-0ubuntu2.3) ...
 dpkg: error processing archive /var/cache/apt/archives/libx11-dev_2%3a1.6.3-1ubuntu2_i386.deb (--unpack):
  trying to overwrite shared '/usr/include/X11/Xcms.h', which is different from other instances of package libx11-dev:i386
ErrorMessage: trying to overwrite shared '/usr/include/X11/Xcms.h', which is different from other instances of package libx11-dev:i386
GraphicsCard:
 Intel Corporation Broadwell-U Integrated Graphics [8086:1616] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Toshiba America Info Systems Broadwell-U Integrated Graphics [1179:f840]
InstallationDate: Installed on 2016-09-03 (387 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
MachineType: TOSHIBA Satellite C55-C
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-59-generic.efi.signed root=UUID=5a16cdbd-726a-45b9-944a-6b66f4f8e612 ro quiet splash radeon.audio=1 vt.handoff=7
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.15ubuntu0.2
SourcePackage: libx11
Title: package libx11-dev 2:1.6.3-1ubuntu2 [modified: usr/include/X11/Xcms.h usr/include/X11/Xlibint.h usr/include/X11/Xlocale.h usr/include/X11/Xregion.h usr/include/X11/Xutil.h] failed to install/upgrade: trying to overwrite shared '/usr/include/X11/Xcms.h', which is different from other instances of package libx11-dev:i386
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/11/2015
dmi.bios.vendor: INSYDE Corp.
dmi.bios.version: 5.10
dmi.board.name: 06F2
dmi.board.vendor: FF50
dmi.board.version: Type2 - Board Version
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: OEM Chassis ManuFacturer
dmi.chassis.version: OEM Chassis Version
dmi.modalias: dmi:bvnINSYDECorp.:bvr5.10:bd09/11/2015:svnTOSHIBA:pnSatelliteC55-C:pvrPSCPJU-00R011:rvnFF50:rn06F2:rvrType2-BoardVersion:cvnOEMChassisManuFacturer:ct10:cvrOEMChassisVersion:
dmi.product.name: Satellite C55-C
dmi.product.version: PSCPJU-00R011
dmi.sys.vendor: TOSHIBA
version.compiz: compiz 1:0.9.12.2+16.04.20160823-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1ubuntu0.16.04.2
version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2.2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2.2
version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-0ubuntu0.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2
xserver.bootTime: Mon Sep 25 23:42:17 2017
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 1110
 vendor LGD
xserver.version: 2:1.18.4-0ubuntu0.1