package phpmyadmin 4:4.6.6-5 failed to install/upgrade: installed phpmyadmin package post-installation script subprocess returned error exit status 1

[Krishna Joshiar]

Creating config file /etc/phpmyadmin/config-db.php with new version
checking privileges on database phpmyadmin for phpmyadmin@localhost: user creation needed.
granting access to database phpmyadmin for phpmyadmin@localhost: failed.
error encountered creating user:
mysql said: ERROR 1044 (42000) at line 1: Access denied for user 'debian-sys-maint'@'localhost' to database 'phpmyadmin'
dbconfig-common: phpmyadmin configure: trying again.
Determining localhost credentials from /etc/mysql/debian.cnf: succeeded.
dbconfig-common: writing config to /etc/dbconfig-common/phpmyadmin.conf
checking privileges on database phpmyadmin for phpmyadmin@localhost: user creation needed.
granting access to database phpmyadmin for phpmyadmin@localhost: failed.
error encountered creating user:
mysql said: ERROR 1044 (42000) at line 1: Access denied for user 'debian-sys-maint'@'localhost' to database 'phpmyadmin'
dbconfig-common: phpmyadmin configure: aborted.
dbconfig-common: flushing administrative password
dpkg: error processing package phpmyadmin (--configure):
 installed phpmyadmin package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
 phpmyadmin
E: Sub-process /usr/bin/dpkg returned an error code (1)

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: phpmyadmin 4:4.6.6-5
ProcVersionSignature: Ubuntu 4.15.0-43.46-generic 4.15.18
Uname: Linux 4.15.0-43-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
Date: Mon Dec 24 22:13:42 2018
ErrorMessage: installed phpmyadmin package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2018-12-24 (0 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
PackageArchitecture: all
Python3Details: /usr/bin/python3.6, Python 3.6.7, python3-minimal, 3.6.7-1~18.04
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2.1
 apt 1.6.6
SourcePackage: phpmyadmin
Title: package phpmyadmin 4:4.6.6-5 failed to install/upgrade: installed phpmyadmin package post-installation script subprocess returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)