package snapd 2.46.1+20.04 failed to install/upgrade: package is in a very bad inconsistent state; you should reinstall it before attempting configuration

[Morita Masato]

when emac install snap faild

ProblemType: Package
DistroRelease: Ubuntu 20.04
ProcVersionSignature: Ubuntu 5.4.0-47.51-generic 5.4.55
Uname: Linux 5.4.0-47-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.11-0ubuntu27.9
AptOrdering:
 snap:amd64: Install
 NULL: ConfigurePending
Architecture: amd64
CasperMD5CheckResult: skip
Date: Sun Sep 20 16:31:31 2020
ErrorMessage: package is in a very bad inconsistent state; you should reinstall it before attempting configuration
InstallationDate: Installed on 2020-09-04 (15 days ago)
InstallationMedia: Ubuntu 20.04.1 "Focal Fossa" - Release amd64(20200808.1)
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 2.0.3
Snap: snapd 2.46.1 (latest/stable)
Title: package snapd 2.46.1+20.04 failed to install/upgrade: package is in a very bad inconsistent state; you should reinstall it before attempting configuration
UpgradeStatus: No upgrade log present (probably fresh install)