package lubuntu-default-settings 0.53 failed to install/upgrade: trying to overwrite '/usr/share/xsessions/Lubuntu.desktop', which is also in package lubuntu-default-session 0.53

[Bernhard Nikola]

not seen complete, but something about an "xdm-package" ???

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: lubuntu-default-settings 0.53
ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13
Uname: Linux 4.13.0-32-generic x86_64
ApportVersion: 2.20.8-0ubuntu10
Architecture: amd64
Date: Thu Feb 15 23:05:36 2018
DuplicateSignature:
 package:lubuntu-default-settings:0.53
 Unpacking lubuntu-default-settings (0.54) over (0.53) ...
 dpkg: error processing archive /tmp/apt-dpkg-install-XGVmma/63-lubuntu-default-settings_0.54_all.deb (--unpack):
  trying to overwrite '/usr/share/xsessions/Lubuntu.desktop', which is also in package lubuntu-default-session 0.53
ErrorMessage: trying to overwrite '/usr/share/xsessions/Lubuntu.desktop', which is also in package lubuntu-default-session 0.53
InstallationDate: Installed on 2018-02-11 (4 days ago)
InstallationMedia: Lubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20171227)
JournalErrors:
 -- Logs begin at Sun 2018-02-11 18:43:17 CET, end at Thu 2018-02-15 23:12:05 CET. --
 Feb 15 18:17:24 hostname avahi-daemon[449]: chroot.c: open() failed: No such file or directory
 Feb 15 18:17:25 hostname NetworkManager[448]: ((src/devices/nm-device.c:1452)): assertion '<dropped>' failed
 Feb 15 18:22:29 hostname anacron[452]: Can't find sendmail at /usr/sbin/sendmail, not mailing output
 Feb 15 23:05:36 hostname AptDaemon.Worker[2360]: CRITICAL: /tmp/apt-dpkg-install-XGVmma/63-lubuntu-default-settings_0.54_all.deb: trying to overwrite '/usr/share/xsessions/Lubuntu.desktop', which is also in package lubuntu-default-session 0.53
PackageArchitecture: all
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: lubuntu-default-settings
Title: package lubuntu-default-settings 0.53 failed to install/upgrade: trying to overwrite '/usr/share/xsessions/Lubuntu.desktop', which is also in package lubuntu-default-session 0.53
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.xdg.lubuntu.lxdm.lxdm.conf: 2018-02-11T18:36:58.778828