Yum error: package libstdc++-devel... requires libstdc++..., but none of the providers can be installed

Issue

"yum update"shown an error:

# yum update
This system is receiving updates from CloudLinux Network server.
...
Error:
 Problem 1: package libstdc++-devel-8.5.0-16.el8_7.alma.x86_64 requires libstdc++(x86-64) = 8.5.0-16.el8_7.alma, but none of the providers can be installed
  - cannot install both libstdc++-8.5.0-18.el8.alma.x86_64 and libstdc++-8.5.0-16.el8_7.alma.x86_64
  - cannot install the best update candidate for package libstdc++-devel-8.5.0-16.el8_7.alma.x86_64
  - cannot install the best update candidate for package libstdc++-8.5.0-16.el8_7.alma.x86_64

 

Environment

• Yum/Dnf
• CloudLinux OS
• CloudLinux OS 8

Solution

1. Check for presence "BaseOS" repository automatically generated with DNF.
   

   # yum repolist | grep -i "cloudlinux_8_BaseOS_x86_64"
   ...
   repo.cloudlinux.com_cloudlinux_8_BaseOS_x86_64_os_ created by dnf config-manager from https://repo.cloudlinux.com/cloudlinux/8/BaseOS/x86_64/os/

2. Remove the repository file and clean yum's cache:
   

   # mv /etc/yum.repos.d/repo.cloudlinux.com_cloudlinux_8_BaseOS_x86_64_os_.repo{,.old} 
   # yum clean all
   # yum makecache

Cause

The leftover BaseOS repository that was used before the registration procedure contains outdated packages.