The Model repository locks objects to prevent users from overwriting work. The Model repository can lock any object that the Developer tool or the Analyst tool displays, except for projects and folders.
You can manage locked objects in a Model repository that is not integrated with a version control system. You can manage checked out objects in a Model repository that is integrated with a version control system. When the Model repository is integrated with a version control system, you can view, undo, or re-assign the checked-out state of an object.