I'm receiving the same error upgrading Debian Testing. Upon searching the web for solutions I was led to this bug report. Here is what I'm getting in Testing:
dpkg: error processing archive /var/cache/apt/archives/libcomerr2_1.43.9-1_all.deb (--unpack): libcomerr2:all 1.43.9-1 (Multi-Arch: no) is not co-installable with libcomerr2 which has multiple installed instances Selecting previously unselected package libcom-err2:amd64. dpkg: considering deconfiguration of libcomerr2:amd64, which would be broken by installation of libcom-err2:amd64 ... dpkg: yes, will deconfigure libcomerr2:amd64 (broken by libcom-err2:amd64) (Reading database ... 318353 files and directories currently installed.) Preparing to unpack .../libcom-err2_1.43.9-1_amd64.deb ... De-configuring libcomerr2:amd64 (1.43.8-2) ... Unpacking libcom-err2:amd64 (1.43.9-1) ... Replacing files in old package libcomerr2:amd64 (1.43.8-2) ... Errors were encountered while processing: /var/cache/apt/archives/libcomerr2_1.43.9-1_all.deb E: Sub-process /usr/bin/dpkg returned an error code (1) 'apt --fix-broken install' returns the following: The following additional packages will be installed: libcomerr2 The following packages will be upgraded: libcomerr2 1 upgraded, 0 newly installed, 0 to remove and 230 not upgraded. 2 not fully installed or removed. Need to get 0 B/62.2 kB of archives. After this operation, 18.4 kB disk space will be freed. Do you want to continue? [Y/n] Retrieving bug reports... Done Parsing Found/Fixed information... Done Reading changelogs... Done dpkg: error processing archive /var/cache/apt/archives/libcomerr2_1.43.9-1_all.deb (--unpack): libcomerr2:all 1.43.9-1 (Multi-Arch: no) is not co-installable with libcomerr2 which has multiple installed instances Errors were encountered while processing: /var/cache/apt/archives/libcomerr2_1.43.9-1_all.deb E: Sub-process /usr/bin/dpkg returned an error code (1) -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to e2fsprogs in Ubuntu. https://bugs.launchpad.net/bugs/1749036 Title: package libcomerr2 1.43.8-2 failed to install/upgrade: libcomerr2:all 1.43.9-1 (Multi-Arch: no) is not co-installable with libcomerr2 which has multiple installed instances Status in e2fsprogs package in Ubuntu: Confirmed Bug description: This happened during a partial upgrade of Bionic. ProblemType: Package DistroRelease: Ubuntu 18.04 Package: libcomerr2 1.43.8-2 ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13 Uname: Linux 4.13.0-32-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia ApportVersion: 2.20.8-0ubuntu8 Architecture: amd64 Date: Mon Feb 12 15:51:57 2018 Dependencies: gcc-7-base 7.2.0-18ubuntu2 libc6 2.26-0ubuntu2 libgcc1 1:7.2.0-18ubuntu2 DpkgTerminalLog: Preparing to unpack .../comerr-dev_2.1-1.43.9-1_amd64.deb ... Unpacking comerr-dev:amd64 (2.1-1.43.9-1) over (2.1-1.43.8-2) ... dpkg: error processing archive /var/cache/apt/archives/libcomerr2_1.43.9-1_all.deb (--unpack): libcomerr2:all 1.43.9-1 (Multi-Arch: no) is not co-installable with libcomerr2 which has multiple installed instances DuplicateSignature: package:libcomerr2:1.43.8-2 Unpacking comerr-dev:amd64 (2.1-1.43.9-1) over (2.1-1.43.8-2) ... dpkg: error processing archive /var/cache/apt/archives/libcomerr2_1.43.9-1_all.deb (--unpack): libcomerr2:all 1.43.9-1 (Multi-Arch: no) is not co-installable with libcomerr2 which has multiple installed instances ErrorMessage: libcomerr2:all 1.43.9-1 (Multi-Arch: no) is not co-installable with libcomerr2 which has multiple installed instances InstallationDate: Installed on 2013-01-16 (1853 days ago) InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130116) Python3Details: /usr/bin/python3.6, Python 3.6.4, python3-minimal, 3.6.4-1 PythonDetails: /usr/bin/python2.7, Python 2.7.14+, python-minimal, 2.7.14-4 RelatedPackageVersions: dpkg 1.19.0.5ubuntu1 apt 1.6~alpha7ubuntu1 SourcePackage: e2fsprogs Title: package libcomerr2 1.43.8-2 failed to install/upgrade: libcomerr2:all 1.43.9-1 (Multi-Arch: no) is not co-installable with libcomerr2 which has multiple installed instances UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/e2fsprogs/+bug/1749036/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp