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

[Roger]

Happened when updating. A number of PPAs enbled, unfortunately, but the problem immediately went away upon a

sudo apt -f install

and

sudo dpkg --configure -a

ProblemType: Package
DistroRelease: Ubuntu 17.10
Package: libsane1 1.0.27-1~experimental2ubuntu2.1
ProcVersionSignature: Ubuntu 4.13.0-19.22-generic 4.13.13
Uname: Linux 4.13.0-19-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.7-0ubuntu3.6
Architecture: amd64
Date: Mon Dec 18 23:53:06 2017
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 2017-09-27 (82 days ago)
InstallationMedia: Ubuntu-GNOME 17.04 "Zesty Zapus" - Release amd64 (20170412)
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: Upgraded to artful on 2017-09-29 (80 days ago)