Hierarchical Loop Detected.
Space and Space Child objects are connected through the Space Hierarchy relation. The hierarchy is such that all the objects are connected to the project root. In a healthy database, no loop exists in the hierarchy. However, in this case, the database integrity script has detected a space hierarchical loop in the Model database for the space objects.
Coding or data model errors in an earlier version.
The objects may not display in the Workspace Explorer and graphic view, as the object is not connected to the project root.
What You Should Do
Run the Clean Database custom command to break the loop. This command will set the project root as the parent to these objects.