package dbus 1.12.20-1ubuntu3 failed to install/upgrade: triggers looping, abandoned

[Cyril Monnot]

tried to update from 20.10 to 21.04

ProblemType: Package
DistroRelease: Ubuntu 21.04
Package: dbus 1.12.20-1ubuntu3
ProcVersionSignature: Ubuntu 5.8.0-59.66-generic 5.8.18
Uname: Linux 5.8.0-59-generic x86_64
ApportVersion: 2.20.11-0ubuntu65.1
Architecture: amd64
CasperMD5CheckResult: unknown
Date: Thu Aug 26 16:46:04 2021
ErrorMessage: triggers looping, abandoned
InstallationDate: Installed on 2021-04-22 (126 days ago)
InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
Python3Details: /usr/bin/python3.9, Python 3.9.5, python3-minimal, 3.9.4-1
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.20.9ubuntu1
 apt 2.2.4ubuntu0.1
SourcePackage: dbus
Title: package dbus 1.12.20-1ubuntu3 failed to install/upgrade: triggers looping, abandoned
UpgradeStatus: No upgrade log present (probably fresh install)