Dear Maintainer,

Attempting to `apt-get remove lvm2` fails in the pre-removal script:



jagerman@keynes:~$ sudo apt-get -y remove lvm2
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
  lvm2
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
After this operation, 3,374 kB disk space will be freed.
(Reading database ... 343047 files and directories currently installed.)
Removing lvm2 (2.02.176-4) ...
Syntax: /usr/bin/deb-systemd-invoke <action> <unit file> [<unit file> ...]
dpkg: error processing package lvm2 (--remove):
 installed lvm2 package pre-removal script subprocess returned error exit status 1
Failed to start lvm2-monitor.service: Unit dm-event.socket is masked.
Syntax: /usr/bin/deb-systemd-invoke <action> <unit file> [<unit file> ...]
Errors were encountered while processing:
 lvm2
E: Sub-process /usr/bin/dpkg returned an error code (1)