package grub-efi-amd64-signed 1.46.5+2.02~beta2-22ubuntu1.5 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

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ProblemType: Package
DistroRelease: Ubuntu 15.04
Package: grub-efi-amd64-signed 1.46.5+2.02~beta2-22ubuntu1.5
Uname: Linux 4.1.0-040100rc2-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.8
Architecture: amd64
Date: Tue Jan 12 05:38:29 2016
DuplicateSignature: package:grub-efi-amd64-signed:1.46.5+2.02~beta2-22ubuntu1.5:subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2015-10-14 (89 days ago)
InstallationMedia: Ubuntu 12.04.5 LTS "Precise Pangolin" - Release amd64 (20140807.1)
RelatedPackageVersions:
 dpkg 1.17.25ubuntu1.1
 apt 1.0.9.7ubuntu4.2
SourcePackage: grub2-signed
Title: package grub-efi-amd64-signed 1.46.5+2.02~beta2-22ubuntu1.5 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to vivid on 2016-01-11 (0 days ago)