package libgcc1 1:8.4.0-1ubuntu1~18.04 failed to install/upgrade: libgcc1:amd64 1:10-20200411-0ubuntu1 (Multi-Arch: no) is not co-installable with libgcc1 which has multiple installed instances

[CHANWOO LEE]

happened while upgrading 18 to 20

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: libgcc1 1:8.4.0-1ubuntu1~18.04
ProcVersionSignature: Ubuntu 4.15.0-118.119-generic 4.15.18
Uname: Linux 4.15.0-118-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.17
Architecture: amd64
Date: Fri Sep 25 09:03:06 2020
DuplicateSignature:
 package:libgcc1:1:8.4.0-1ubuntu1~18.04
 Unpacking libglvnd0:amd64 (1.3.1-1ubuntu0.20.04.1) over (1.0.0-2ubuntu2.3) ...
 dpkg: error processing archive /tmp/apt-dpkg-install-GTkYlx/28-libgcc1_1%3a10-20200411-0ubuntu1_amd64.deb (--unpack):
  libgcc1:amd64 1:10-20200411-0ubuntu1 (Multi-Arch: no) is not co-installable with libgcc1 which has multiple installed instances
ErrorMessage: libgcc1:amd64 1:10-20200411-0ubuntu1 (Multi-Arch: no) is not co-installable with libgcc1 which has multiple installed instances
InstallationDate: Installed on 2016-06-13 (1564 days ago)
InstallationMedia: Ubuntu 14.04.4 LTS "Trusty Tahr" - Release amd64 (20160217.1)
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 1.19.0.5ubuntu2.3
 apt 1.6.12ubuntu0.1
SourcePackage: gcc-8
Title: package libgcc1 1:8.4.0-1ubuntu1~18.04 failed to install/upgrade: libgcc1:amd64 1:10-20200411-0ubuntu1 (Multi-Arch: no) is not co-installable with libgcc1 which has multiple installed instances
UpgradeStatus: Upgraded to focal on 2020-09-25 (0 days ago)