File <file name> contains service <service name> which already exists in other configuration files selected for upgrade.
The value for the <RepositoryName> or <ServerName> property in the Repository Agent or PowerCenter Server configuration file matches the same property in another configuration file under the server/upgrade/cfgfiles directory on the node. All configuration files you want to upgrade must contain different values for the <RepositoryName> or <ServerName> properties. There may be duplicate configuration files in the upgrade directory.
Make sure the configuration file have unique values for the <RepositoryName> or <ServerName> properties and validate the files again.