package libsane1 1.0.27-1~experimental2ubuntu2.1 failed to install/upgrade: trying to overwrite shared '/lib/udev/hwdb.d/20-sane.hwdb', which is different from other instances of package libsane1:i386

[Anand]

In addition to this issue, a similar bug may be :

From Bug at https://bugs.launchpad.net/ubuntu/+source/sane-backends/+bug/1725928 :
#3 comment which said :
sudo apt-get -o Dpkg::Options::="--force-overwrite" install --reinstall sane-backends

The above did not work for and showed me the following message
E: Unable to locate package sane-backends

ProblemType: Package
DistroRelease: Ubuntu 17.10
Package: libsane1 1.0.27-1~experimental2ubuntu2.1
ProcVersionSignature: Ubuntu 4.13.0-21.24-generic 4.13.13
Uname: Linux 4.13.0-21-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.7-0ubuntu3.6
Architecture: amd64
Date: Sat Dec 30 16:06:44 2017
DuplicateSignature:
 package:libsane1:1.0.27-1~experimental2ubuntu2.1
 Unpacking libsane1:i386 (1.0.27-1~experimental2ubuntu2.1) ...
 dpkg: error processing archive /tmp/apt-dpkg-install-VL4q79/116-libsane1_1.0.27-1~experimental2ubuntu2.1_i386.deb (--unpack):
  trying to overwrite shared '/lib/udev/hwdb.d/20-sane.hwdb', which is different from other instances of package libsane1:i386
ErrorMessage: trying to overwrite shared '/lib/udev/hwdb.d/20-sane.hwdb', which is different from other instances of package libsane1:i386
InstallationDate: Installed on 2017-11-08 (51 days ago)
InstallationMedia: Ubuntu-MATE 17.10 "Artful Aardvark" - Release amd64 (20171018)
Python3Details: /usr/bin/python3.6, Python 3.6.3, python3-minimal, 3.6.3-0ubuntu2
PythonDetails: /usr/bin/python2.7, Python 2.7.14, python-minimal, 2.7.14-2ubuntu1
RelatedPackageVersions:
 dpkg 1.18.24ubuntu1
 apt 1.5.1
SourcePackage: sane-backends
Title: package libsane1 1.0.27-1~experimental2ubuntu2.1 failed to install/upgrade: trying to overwrite shared '/lib/udev/hwdb.d/20-sane.hwdb', which is different from other instances of package libsane1:i386
UpgradeStatus: No upgrade log present (probably fresh install)

[dino99 (9d9)]

'sane-backends' is a generic naming; simply replace it with your installed 'sane/libsane' packages.
https://launchpad.net/ubuntu/+source/sane-backends