RPM repo not found connection errors on Centos Redhat duplicate problems

yum -y update command failing

Command line will show messages like

xxx is outdated and v abc will be installed
but at the end it shows duplicate binary, please remove duplicate first.

Process

Backup first
Integrity Check
Find Problems
Identify duplicates
Clean duplicates
re build conf cache
update command
remove backup file .prev if successfully solved

\cp -r /var/lib/rpm /var/lib/rpm.prev
yum-complete-transaction
package-cleanup --problems
package-cleanup --dupes
package-cleanup --cleandupes
yum clean all
rpm --rebuilddb
yum update
# if all went OK run 'rm -rf /var/lib/rpm.prev'

Other possible solution

1. Update DNS to google dns 8.8.8.8 and 8.8.4.4 or freenom dns 80.80.80.80 and 80.80.81.81

system-config-network

2. Restart internet while maintaining SSH session (you wont be logged out)

/etc/init.d/network restart