package libatk-adaptor (not installed) failed to install/upgrade: trying to overwrite shared '/etc/X11/Xsession.d/90atk-adaptor', which is different from other instances of package libatk-adaptor:i386

[Robert]

xubuntu
installed Steam
installed System Shock 2
tried to start it from Steam; did not work.
installed wine1.6
tried to run autorun within the .local/share/Steam/steamapps/common/SS2/bin; error missing packages
installed :sudo apt install libatk-adaptor:i386 libgail-common:i386

Error install :

Preparing to unpack .../libatk-adaptor_2.18.1-2ubuntu1_i386.deb ...
Unpacking libatk-adaptor:i386 (2.18.1-2ubuntu1) ...
dpkg: error processing archive /var/cache/apt/archives/libatk-adaptor_2.18.1-2ubuntu1_i386.deb (--unpack):
 trying to overwrite shared '/etc/X11/Xsession.d/90atk-adaptor', which is different from other instances of package libatk-adaptor:i386
Processing triggers for libc-bin (2.23-0ubuntu10) ...

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: libatk-adaptor (not installed)
ProcVersionSignature: Ubuntu 4.4.0-127.153-generic 4.4.128
Uname: Linux 4.4.0-127-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.17
Architecture: amd64
Date: Wed May 30 20:24:01 2018
DuplicateSignature:
 package:libatk-adaptor:(not installed)
 Unpacking libatk-adaptor:i386 (2.18.1-2ubuntu1) ...
 dpkg: error processing archive /var/cache/apt/archives/libatk-adaptor_2.18.1-2ubuntu1_i386.deb (--unpack):
  trying to overwrite shared '/etc/X11/Xsession.d/90atk-adaptor', which is different from other instances of package libatk-adaptor:i386
ErrorMessage: trying to overwrite shared '/etc/X11/Xsession.d/90atk-adaptor', which is different from other instances of package libatk-adaptor:i386
InstallationDate: Installed on 2017-08-16 (286 days ago)
InstallationMedia: Ubuntu-Server 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.4
 apt 1.2.26
SourcePackage: at-spi2-atk
Title: package libatk-adaptor (not installed) failed to install/upgrade: trying to overwrite shared '/etc/X11/Xsession.d/90atk-adaptor', which is different from other instances of package libatk-adaptor:i386
UpgradeStatus: No upgrade log present (probably fresh install)