Public bug reported:

I do not know the details. 
It is system generated. 
Kindly find a way to auto detect these things.

Thanking you,

ProblemType: Package
DistroRelease: Ubuntu 24.04
Package: grub-efi-amd64 2.12-1ubuntu7.3
ProcVersionSignature: Ubuntu 6.11.0-26.26~24.04.1-generic 6.11.11
Uname: Linux 6.11.0-26-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.28.1-0ubuntu3.5
Architecture: amd64
CasperMD5CheckResult: pass
Date: Fri Oct  3 11:32:39 2025
DpkgHistoryLog:
 Start-Date: 2025-10-03  11:32:37
 Commandline: /usr/bin/unattended-upgrade
 Upgrade: cups-bsd:amd64 (2.4.7-1.2ubuntu7.3, 2.4.7-1.2ubuntu7.4), 
cups-common:amd64 (2.4.7-1.2ubuntu7.3, 2.4.7-1.2ubuntu7.4), cups-client:amd64 
(2.4.7-1.2ubuntu7.3, 2.4.7-1.2ubuntu7.4), cups-ppdc:amd64 (2.4.7-1.2ubuntu7.3, 
2.4.7-1.2ubuntu7.4), cups-daemon:amd64 (2.4.7-1.2ubuntu7.3, 
2.4.7-1.2ubuntu7.4), libcups2t64:amd64 (2.4.7-1.2ubuntu7.3, 
2.4.7-1.2ubuntu7.4), cups-ipp-utils:amd64 (2.4.7-1.2ubuntu7.3, 
2.4.7-1.2ubuntu7.4), libcupsimage2t64:amd64 (2.4.7-1.2ubuntu7.3, 
2.4.7-1.2ubuntu7.4), cups-core-drivers:amd64 (2.4.7-1.2ubuntu7.3, 
2.4.7-1.2ubuntu7.4), cups:amd64 (2.4.7-1.2ubuntu7.3, 2.4.7-1.2ubuntu7.4), 
cups-server-common:amd64 (2.4.7-1.2ubuntu7.3, 2.4.7-1.2ubuntu7.4)
DuplicateSignature:
 package:grub-efi-amd64:2.12-1ubuntu7.3
 Setting up grub-efi-amd64 (2.12-1ubuntu7.3) ...
 sed: cannot rename /etc/default/sedpxc2lL: Operation not permitted
 dpkg: error processing package grub-efi-amd64 (--configure):
  installed grub-efi-amd64 package post-installation script subprocess returned 
error exit status 4
ErrorMessage: installed grub-efi-amd64 package post-installation script 
subprocess returned error exit status 4
InstallationDate: Installed on 2025-04-28 (157 days ago)
InstallationMedia: Ubuntu 24.04.2 LTS "Noble Numbat" - Release amd64 (20250215)
Python3Details: /usr/bin/python3.12, Python 3.12.3, python3-minimal, 
3.12.3-0ubuntu2
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.22.6ubuntu6.1
 apt  2.7.14build2
SourcePackage: grub2-unsigned
Title: package grub-efi-amd64 2.12-1ubuntu7.3 failed to install/upgrade: 
installed grub-efi-amd64 package post-installation script subprocess returned 
error exit status 4
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: grub2-unsigned (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-package noble

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https://bugs.launchpad.net/bugs/2126738

Title:
  package grub-efi-amd64 2.12-1ubuntu7.3 failed to install/upgrade:
  installed grub-efi-amd64 package post-installation script subprocess
  returned error exit status 4

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