In rare occassions you may have an error such as "is a duplicate with". In such case, you will need to remove the duplicates from yum. Here is an example error in yum:
yum-3.4.3-158.el7.centos.noarch is a duplicate with yum-3.4.3-154.el7.centos.1.noarch yum-plugin-fastestmirror-1.1.31-45.el7.noarch is a duplicate with yum-plugin-fastestmirror-1.1.31-42.el7.noarch
NOTE As always, create a backup before running the commands below.
Make sure that you have yum-utils installed before you continue:
yum install yum-utils -y
The following command resolves this issue:
package-cleanup —cleandupes
Depending on your situation, you may get the following error:
Warning: Some duplicates were not removed because they are required by installed packages. You can try —cleandupes without --removenewestdupes, or review them with --dupes and remove manually.
To resolve this, execute the following command:
package-cleanup --cleandupes --removenewestdupes
If this command still shows errors, you can try to reinstall the packages. Replace packagename with the actual packagename you want to reinstall.
yum reinstall packagename