Edit an existing tree in account hierarchy (department)

Summary:

Edit an existing tree in account hierarchy (department)

Content (required):

We need to add an additional layer of summery department and children for the tree department under Manage Account Hierarchies page.

Currently there is one active version under the department tree.

What is the best way to add this layer?

Do we need to create new tree version for departments (duplicate current version and add the new layer) or edit the existing version and add the new layer?

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

23C

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