Duplicate Term Creation Lacks User Notification within a same namespace.

[mavenzer]

When attempting to create a term with the same name within the same namespace, the system correctly prevents the creation. However, it does not notify the user about this behavior, leading to confusion.

Expected Behavior:
The web interface should display an error message when a user tries to create a duplicate term within the same namespace, clearly indicating that the term already exists.

Current Behavior:

• No error message or notification is displayed to the user.

We are more than happy to contribute to the above bug.