yum update fails ...

Error:
Problem: cannot install both graphviz-2.40.1-43.el8.x86_64 and graphviz-2.40.1-40.el8.x86_64
- package graphviz-gd-2.40.1-40.el8.x86_64 requires graphviz = 2.40.1-40.el8, but none of the providers can be installed
- cannot install the best update candidate for package graphviz-2.40.1-40.el8.x86_64
- problem with installed package graphviz-gd-2.40.1-40.el8.x86_64
(try to add '--allowerasing' to command line to replace conflicting packages or '--skip-broken' to skip uninstallable packages or '--nobest' to use not only best candidate packages)


##this command helps a bit to get the system updated
yum update --skip-broken --nobest

##but the error still exists,
##what to do now? > maybe disable a repository?!

##show which repositories are enabledyum repolist enabled
Paketquellen-ID Paketquellen-Name:
appstream CentOS Linux 8 - AppStream
baseos CentOS Linux 8 - BaseOS
epel Extra Packages for Enterprise Linux 8 - x86_64
epel-modular Extra Packages for Enterprise Linux Modular 8 - x86_64
extras CentOS Linux 8 - Extras


>> solution: disable the CentOS-Linux-AppStream repo
>> set enabled=0

cat /etc/yum.repos.d/CentOS-Linux-AppStream.repo

[appstream]
name=CentOS Linux $releasever - AppStream
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=AppStream&infra=$infra
#baseurl=http://mirror.centos.org/$contentdir/$releasever/AppStream/$basearch/os/
gpgcheck=1
#disabled because of conflict
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

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