The following packages will be upgraded:
  libcairo2 libcairo2:i386
2 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/1.193 kB of archives.
After this operation, 4.096 B of additional disk space will be used.
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(Reading database ... 342251 files and directories currently installed.)
Preparing to unpack .../0-libcairo2_1.15.2-0intel1_amd64.deb ...
Unpacking libcairo2:amd64 (1.15.2-0intel1) over (1.15.2-0intel1) ...
dpkg: error processing archive /tmp/apt-dpkg-install-9ZMnio/0-libcairo2_1.15.2-0intel1_amd64.deb (--unpack):
 trying to overwrite shared '/usr/share/doc/libcairo2/changelog.Debian.gz', which is different from other instances of package libcairo2:amd64
Preparing to unpack .../1-libcairo2_1.15.2-0intel1_i386.deb ...
Unpacking libcairo2:i386 (1.15.2-0intel1) over (1.15.2-0intel1) ...
dpkg: error processing archive /tmp/apt-dpkg-install-9ZMnio/1-libcairo2_1.15.2-0intel1_i386.deb (--unpack):
 trying to overwrite shared '/usr/share/doc/libcairo2/changelog.Debian.gz', which is different from other instances of package libcairo2:i386
Errors were encountered while processing:
 /tmp/apt-dpkg-install-9ZMnio/0-libcairo2_1.15.2-0intel1_amd64.deb
 /tmp/apt-dpkg-install-9ZMnio/1-libcairo2_1.15.2-0intel1_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)