package grub-efi-amd64-signed 1.142.5+2.04-1ubuntu26.3 failed to install/upgrade: il sottoprocesso installato pacchetto grub-efi-amd64-signed script post-installation ha restituito lo stato di errore 32

[giuseppe cinque]

the system try to uodate and install grub on my first disc wich is a Sabrent ssd nvme,but since the beginning i have installed Ubuntu and the grub on a external usb normal disc and i don't want to install the grub on the nvme to avoid problems

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: grub-efi-amd64-signed 1.142.5+2.04-1ubuntu26.3
ProcVersionSignature: Ubuntu 5.4.0-45.49-generic 5.4.55
Uname: Linux 5.4.0-45-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.8
Architecture: amd64
CasperMD5CheckResult: skip
Date: Mon Sep 14 17:24:54 2020
ErrorMessage: il sottoprocesso installato pacchetto grub-efi-amd64-signed script post-installation ha restituito lo stato di errore 32
InstallationDate: Installed on 2020-06-13 (93 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: /usr/bin/python2.7, Python 2.7.18rc1, python-is-python2, 2.7.17-4
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.2ubuntu0.1
SourcePackage: grub2-signed
Title: package grub-efi-amd64-signed 1.142.5+2.04-1ubuntu26.3 failed to install/upgrade: il sottoprocesso installato pacchetto grub-efi-amd64-signed script post-installation ha restituito lo stato di errore 32
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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