Receive the following error when trying to create a Department if name is same as another child in the same node
OBS-0212: OBS unit names must be unique within a parent unit.
Release : All Supported
Component : CA PPM STUDIO
This working as designed. Departments that share the same Parent Department cannot have the same name
The one option would be to rename the Department so it doesn't have the same name as any other Department (example: Department1, Department2, etc) with the same Parent Department.
Reference KB: Enhancement Requests for Clarity
Reference KB: Searching for known Clarity Issues using Self Service