package readline-common 7.0-3 failed to install/upgrade: package readline-common is already installed and configured

[Christophe Lyon]

I got this error while upgrading my x86_64 laptop from Ubuntu 17.10 to 18.04.

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: readline-common 7.0-3
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
AptdaemonVersion: 1.1.1+bzr982-0ubuntu19
Architecture: amd64
Date: Sun May 13 22:30:40 2018
DuplicateSignature:
 package:readline-common:7.0-3
 Unpacking fonts-smc-uroob (2.0-1) ...
 dpkg: error processing package libmpfr6 (--configure):
  no package named 'libmpfr6' is installed, cannot configure
ErrorMessage: package readline-common is already installed and configured
InstallationDate: Installed on 2015-04-07 (1132 days ago)
InstallationMedia: Xubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
PackageArchitecture: all
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2
 apt 1.6.1
SourcePackage: dpkg
Title: package readline-common 7.0-3 failed to install/upgrade: package readline-common is already installed and configured
UpgradeStatus: Upgraded to bionic on 2018-05-13 (0 days ago)