package lxd (not installed) failed to install/upgrade: new lxd package pre-installation script subprocess returned error exit status 1

[BlueT - Matthew Lien - 練喆明]

fatal error during running `do-release-upgrade` from 18.04 to 20.04

ProblemType: Package
DistroRelease: Ubuntu 20.04
ProcVersionSignature: Ubuntu 4.15.0-175.184-generic 4.15.18
Uname: Linux 4.15.0-175-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27.21
Architecture: amd64
CasperMD5CheckResult: skip
Date: Fri Apr 8 03:44:03 2022
ErrorMessage: new lxd package pre-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2017-01-17 (1906 days ago)
InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
Python3Details: /usr/bin/python3.8, Python 3.8.10, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.6
Snap: lxd 4.0.9-8e2046b (4.0/stable)
Title: package lxd (not installed) failed to install/upgrade: new lxd package pre-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to focal on 2022-04-07 (0 days ago)