package libqt5gui5:amd64 5.5.1+dfsg-16ubuntu7.7 failed to install/upgrade: package is in a very bad inconsistent state; you should reinstall it before attempting configuration

shivam@shivam-HP-Notebook:~$ sudo apt install ndisc6
[sudo] password for shivam:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
  ndisc6
0 upgraded, 1 newly installed, 0 to remove and 320 not upgraded.
7 not fully installed or removed.
Need to get 44.3 kB/2,330 kB of archives.
After this operation, 270 kB of additional disk space will be used.
Get:1 http://in.archive.ubuntu.com/ubuntu xenial/universe amd64 ndisc6 amd64 1.0.1-1ubuntu2 [44.3 kB]
Fetched 44.3 kB in 0s (62.6 kB/s)
Selecting previously unselected package ndisc6.
(Reading database ... 241036 files and directories currently installed.)
Preparing to unpack .../ndisc6_1.0.1-1ubuntu2_amd64.deb ...
Unpacking ndisc6 (1.0.1-1ubuntu2) ...
Processing triggers for man-db (2.7.5-1) ...
dpkg: error processing package libqt5gui5:amd64 (--configure):
 package is in a very bad inconsistent state; you should
 reinstall it before attempting configuration
E: Sub-process /usr/bin/dpkg returned an error code (1)

This problem has come when i install something...Kindly guide us how I fixed it

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: libqt5gui5:amd64 5.5.1+dfsg-16ubuntu7.7
ProcVersionSignature: Ubuntu 4.15.0-107.108~16.04.1-generic 4.15.18
Uname: Linux 4.15.0-107-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.23
Architecture: amd64
Date: Thu Aug 6 22:34:51 2020
DpkgHistoryLog:
 Start-Date: 2020-08-06 22:34:48
 Commandline: apt install ndisc6
 Requested-By: shivam (1000)
 Install: ndisc6:amd64 (1.0.1-1ubuntu2)
DuplicateSignature:
 package:libqt5gui5:amd64:5.5.1+dfsg-16ubuntu7.7
 Processing triggers for man-db (2.7.5-1) ...
 dpkg: error processing package libqt5gui5:amd64 (--configure):
  package is in a very bad inconsistent state; you should
ErrorMessage: package is in a very bad inconsistent state; you should reinstall it before attempting configuration
InstallationDate: Installed on 2019-07-26 (377 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.32ubuntu0.1
SourcePackage: qtbase-opensource-src
Title: package libqt5gui5:amd64 5.5.1+dfsg-16ubuntu7.7 failed to install/upgrade: package is in a very bad inconsistent state; you should reinstall it before attempting configuration
UpgradeStatus: No upgrade log present (probably fresh install)