package systemd 229-4ubuntu21 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 2

[elena]

I don't know

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: systemd 229-4ubuntu21
ProcVersionSignature: Ubuntu 4.4.0-103.126-generic 4.4.98
Uname: Linux 4.4.0-103-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.14
Architecture: amd64
Date: Sat Dec 9 12:05:12 2017
DpkgTerminalLog:
 Preparing to unpack .../systemd_229-4ubuntu21_amd64.deb ...
 De-configuring udev (225-1ubuntu9.1) ...
 dpkg: error processing archive /var/cache/apt/archives/systemd_229-4ubuntu21_amd64.deb (--unpack):
  subprocess installed pre-removal script returned error exit status 2
DuplicateSignature:
 package:systemd:229-4ubuntu21
 De-configuring udev (225-1ubuntu9.1) ...
 dpkg: error processing archive /var/cache/apt/archives/systemd_229-4ubuntu21_amd64.deb (--unpack):
  subprocess installed pre-removal script returned error exit status 2
ErrorMessage: subprocess installed pre-removal script returned error exit status 2
InstallationDate: Installed on 2017-03-30 (255 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
MachineType: Acer Aspire E5-571
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-103-generic root=UUID=31a90691-3fd3-4160-8281-d456d0d9bd1e ro quiet splash vt.handoff=7
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.3
 apt 1.2.25
SourcePackage: systemd
Title: package systemd 229-4ubuntu21 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 2
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/18/2014
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: V1.26
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: EA50_HB
dmi.board.vendor: Acer
dmi.board.version: V1.26
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.26
dmi.modalias: dmi:bvnInsydeCorp.:bvrV1.26:bd12/18/2014:svnAcer:pnAspireE5-571:pvrV1.26:rvnAcer:rnEA50_HB:rvrV1.26:cvnAcer:ct10:cvrV1.26:
dmi.product.name: Aspire E5-571
dmi.product.version: V1.26
dmi.sys.vendor: Acer