package mysql-client-core-5.7 5.7.21-0ubuntu0.16.04.1 failed to install/upgrade: package mysql-client-core-5.7 is already installed and configured

[muhammad ejaz]

skype is not installing

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: mysql-client-core-5.7 5.7.21-0ubuntu0.16.04.1
ProcVersionSignature: Ubuntu 4.4.0-109.132-generic 4.4.98
Uname: Linux 4.4.0-109-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.15
AptdaemonVersion: 1.1.1+bzr982-0ubuntu14
Architecture: amd64
CrashReports:
 600:0:116:122508:2018-01-31 13:05:57.770915269 +0500:2018-01-31 13:05:58.770915269 +0500:/var/crash/mysql-client-core-5.7.0.crash
 600:0:116:122508:2018-01-31 13:05:58.798914431 +0500:2018-01-31 13:05:58.782914977 +0500:/var/crash/mysql-server-core-5.7.0.crash
 600:0:116:122498:2018-01-31 13:05:58.782914977 +0500:2018-01-31 13:05:58.770915386 +0500:/var/crash/mysql-client-5.7.0.crash
Date: Wed Jan 31 13:05:58 2018
DuplicateSignature:
 package:mysql-client-core-5.7:5.7.21-0ubuntu0.16.04.1
 Processing triggers for man-db (2.7.5-1) ...
 dpkg: error processing package mysql-client-core-5.7 (--configure):
  package mysql-client-core-5.7 is already installed and configured
ErrorMessage: package mysql-client-core-5.7 is already installed and configured
InstallationDate: Installed on 2017-09-28 (124 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
Logs.var.log.daemon.log:

MySQLConf.etc.mysql.conf.d.mysql.cnf: [mysql]
MySQLConf.etc.mysql.conf.d.mysqldump.cnf:
 [mysqldump]
 quick
 quote-names
 max_allowed_packet = 16M
MySQLConf.etc.mysql.mysql.conf.d.mysqld_safe_syslog.cnf:
 [mysqld_safe]
 syslog
MySQLVarLibDirListing: ['saif', 'online', 'ib_buffer_pool', 'at_door', 'project', 'latiffin_abc', 'mysql', 'laravel', 'performance_schema', 'life_expert', 'ib_logfile0', 'grandsta_umrah', 'beauty', 'shoping_cart', 'phpmyadmin', 'sys', 'online_project', 'ibtmp1', 'ib_logfile1', 'umrah', 'fyp', 'waqar', 'debian-5.7.flag', 'ibdata1', 'auto.cnf', 'car', 'fy_project', 'mysql_upgrade_info']
ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-4.4.0-109-generic root=UUID=466aa173-ec99-49e9-a2bc-f98dcba8ba92 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1
 apt 1.2.15ubuntu0.2
SourcePackage: dpkg
Title: package mysql-client-core-5.7 5.7.21-0ubuntu0.16.04.1 failed to install/upgrade: package mysql-client-core-5.7 is already installed and configured
UpgradeStatus: No upgrade log present (probably fresh install)