package perl-base 5.24.1-2ubuntu1 failed to install/upgrade: package perl-base is already installed and configured

[Zadkin Mangum]

root@crypto-server:~# apt-get update
apt-get: relocation error: /usr/lib/x86_64-linux-gnu/libapt-private.so.0.0: symbol _ZTI17pkgAcquireStatus2, version APTPKG_5.0 not defined in file libapt-pkg.so.5.0 with link time reference

ProblemType: Package
DistroRelease: Ubuntu 17.04
Package: perl-base 5.24.1-2ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-38.42-generic 4.10.17
Uname: Linux 4.10.0-38-generic x86_64
ApportVersion: 2.20.4-0ubuntu4.5
AptTermLog:

AptdaemonVersion: 1.1.1+bzr982-0ubuntu17
Architecture: amd64
Date: Mon Apr 9 14:55:24 2018
DuplicateSignature:
 package:perl-base:5.24.1-2ubuntu1
 Setting up libgcc1:amd64 (1:7.2.0-8ubuntu3.2) ...
 dpkg: error: cannot access archive '/var/cache/apt/archives/debconf-i18n_1.5.63_all.deb': No such file or directory
 dpkg: error processing package debconf (--configure):
  package debconf is already installed and configured
ErrorMessage: package perl-base is already installed and configured
InstallationDate: Installed on 2017-10-13 (177 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
RelatedPackageVersions:
 dpkg 1.18.10ubuntu2
 apt 1.5.1
SourcePackage: dpkg
Title: package perl-base 5.24.1-2ubuntu1 failed to install/upgrade: package perl-base is already installed and configured
UpgradeStatus: Upgraded to zesty on 2018-04-09 (0 days ago)

[Zadkin Mangum (zadkin)]

cannot roll back.

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that there was an error on your system when trying to install a particular package. Please execute the following command, as it will clear your package cache, in a terminal:

sudo apt-get clean

Then try performing the update again. This will likely resolve your issue, but the failure could be caused by filesystem or memory corruption. So please also run a fsck on your filesystem(s) and a memory test. Thanks in advance!

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]