Seems I can't even remove it and install again. The following NEW packages will be installed: syslog-ng 0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded. Need to get 5,234 B of archives. After this operation, 43.0 kB of additional disk space will be used. Get:1 http://download.opensuse.org/repositories/home:/laszlo_budai:/syslog-ng/xUbu... ./ syslog-ng 3.11.1-1 [5,234 B] Fetched 5,234 B in 0s (16.8 kB/s) (Reading database ... 213661 files and directories currently installed.) Preparing to unpack .../syslog-ng_3.11.1-1_all.deb ... Unpacking syslog-ng (3.11.1-1) ... dpkg: error processing archive /var/cache/apt/archives/syslog-ng_3.11.1-1_all.deb (--unpack): trying to overwrite '/lib/systemd/system/syslog-ng.service', which is also in package syslog-ng-core 3.11.1-1 Errors were encountered while processing: /var/cache/apt/archives/syslog-ng_3.11.1-1_all.deb E: Sub-process /usr/bin/dpkg returned an error code (1) From: Clayton Dukes <cdukes@logzilla.net> Date: Friday, July 28, 2017 at 10:24 AM To: Syslog-ng users' and developers' mailing list <syslog-ng@lists.balabit.hu> Subject: Upgrade from 3.10.1-1 to 3.11.1-1 fails on Ubuntu I got this today on one of our Customer's systems, anyone else had this happen? Unpacking syslog-ng (3.11.1-1) over (3.10.1-1) ... dpkg: error processing archive /var/cache/apt/archives/syslog-ng_3.11.1-1_all.deb (--unpack): trying to overwrite '/lib/systemd/system/syslog-ng.service', which is also in package syslog-ng-core 3.11.1-1 Errors were encountered while processing: /var/cache/apt/archives/syslog-ng_3.11.1-1_all.deb E: Sub-process /usr/bin/dpkg returned an error code (1) [cid:image001.png@01D3078D.7F34B460] Clayton Dukes Founder & CEO LogZilla Corporation 2900 N. Quinlan Park Rd, B240-341 Austin, TX, 78732 Tel: 936-4NetOps (463-8677) Web: www.logzilla.net<http://www.logzilla.net/> [cid:image002.png@01D3078D.7F34B460]<https://twitter.com/logzilla>[cid:image003.png@01D3078D.7F34B460]<https://youtu.be/drg5wv_mgfA>[cid:image004.png@01D3078D.7F34B460]<https://www.linkedin.com/in/lzcdukes/> For NetOps, By NetOps!