yum/dnf update が "The operation would result in removing the following protected packages: kernel-core" という問題で失敗する

Issue

カーネルを更新すると、yum が次のエラーで失敗します。

# yum update kernel
Error:
 Problem: The operation would result in removing the following protected packages: kernel-core
(try to add '--skip-broken' to skip uninstallable packages or '--nobest' to use not only best candidate packages)