Is there a way to have a validation to inform the user of duplicate entry when setting up territory?

Summary:

Is there a standard way to have a validation to inform the user of duplicate entry when setting up territories?

Content (required):

For example, user creates new territory with criteria in Customer Inclusion and Product that are exactly same in other existing territory. User should get some kind of warning/error message.

Version (include the version you are using, if applicable):

22D

Code Snippet (add any code snippets that support your topic, if applicable):