The warning message "GLib-WARNING **: GError set over the top of a previous GError" is a generic message from GLib, a core library used by many applications on Linux. This message usually indicates that there might be an issue with error handling in the software you're using, and it's not specific to yum.

To troubleshoot this issue, you can try the following steps:

1. Update Your System:

   • Make sure your system is up to date with the latest software updates.
   bash

• sudo yum update

• Check for Dependency Issues:

  • Ensure that all required libraries and dependencies are installed properly.

• Check Disk Space:

  • Verify that you have enough free disk space. A full disk can cause unexpected errors.

• Verify Repository Configuration:

  • Check the repository configuration files in /etc/yum.repos.d/ for any syntax errors or misconfigurations.

• Check for Proxy Settings:

  • If you're behind a proxy, ensure that the proxy settings are correctly configured in /etc/yum.conf or in the specific repository configuration file.

• Check for SELinux or AppArmor Issues:

  • If you're using SELinux or AppArmor, make sure they are not causing any conflicts or preventing yum them from functioning properly. Check the relevant logs for any related denials.

• Check for System Logs:

  • Review system logs (e.g., /var/log/messages, /var/log/syslog, or /var/log/yum.log) for any specific error messages that might provide more information about the issue.

• Try Different Repositories:

  • If the issue is related to a specific repository, try using different mirrors or repositories.

• Reinstall GLib:

  • If you suspect a problem with GLib itself, you could try reinstalling it.
  bash

9. sudo yum reinstall glib2

10. Contact Support:

    • If none of the above steps resolve the issue, consider seeking support from the application's developers or the Linux distribution's support channels. They may have specific troubleshooting steps for their software.

Please note that if this warning is specific to a particular application running on your system (not just yum), you might want to check the documentation or support channels for that application for more tailored troubleshooting steps.