package grub-efi-amd64-signed 1.66.18+2.02~beta2-36ubuntu3.18 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[nikhil]

i want to install new ubuntu over pre installed

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: grub-efi-amd64-signed 1.66.18+2.02~beta2-36ubuntu3.18
ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
Uname: Linux 4.4.0-31-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
Date: Fri Jun 22 09:00:01 2018
DuplicateSignature:
 package:grub-efi-amd64-signed:1.66.18+2.02~beta2-36ubuntu3.18
 Setting up grub-efi-amd64-signed (1.66.18+2.02~beta2-36ubuntu3.18) ...
 grub-install: error: /usr/lib/grub/i386-pc/modinfo.sh doesn't exist. Please specify --target or --directory.
 dpkg: error processing package grub-efi-amd64-signed (--configure):
  subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.4
 apt 1.2.26
SourcePackage: grub2-signed
Title: package grub-efi-amd64-signed 1.66.18+2.02~beta2-36ubuntu3.18 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.