package grub-efi-amd64-signed 1.34.16+2.02~beta2-9ubuntu1.14 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Avneet]

not able to update

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: grub-efi-amd64-signed 1.34.16+2.02~beta2-9ubuntu1.14
ProcVersionSignature: Ubuntu 4.4.0-78.99~14.04.2-generic 4.4.62
Uname: Linux 4.4.0-78-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.25
Architecture: amd64
Date: Wed Aug 16 20:50:41 2017
DuplicateSignature: package:grub-efi-amd64-signed:1.34.16+2.02~beta2-9ubuntu1.14:subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2016-02-29 (534 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
RelatedPackageVersions:
 dpkg 1.17.5ubuntu5.7
 apt 1.0.1ubuntu2.17
SourcePackage: grub2-signed
Title: package grub-efi-amd64-signed 1.34.16+2.02~beta2-9ubuntu1.14 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)