システムが異なるサブスクリプション管理サービスに登録されていることを示す警告メッセージが表示される

Issue

システムの登録時に、以下のいずれかのエラーメッセージが報告されます。

WARNING

You're about to register your system with the RHN Classic Entitlement Platform.
But, You're already registered with the RHN Certificate-Based Entitlement Platform.

Except for a few cases, Red Hat recommends customers only register with one Entitlement Platform

For more information, consult this Knowledge Base Article:   https://access.redhat.com/kb/docs/DOC-45563

または

WARNING

You're about to register your system with the RHN Certificate-based Entitlement Platform.
But, You're already registered with the RHN Classic Entitlement Platform.

Except for a few cases, Red Hat recommends customers only register with one Entitlement Platform

For more information, consult this Knowledge Base Article:   https://access.redhat.com/kb/docs/DOC-45563