CDS Hierarchy for query browser not allowed

[RaymondPu]

Hi Experts, I am trying to have the tree layout in Query Browser' app where the hierarchy logic should be based on Work Breakdown Structures (WBS).

The issue that I am having is: in CDS, when I am setting @AnalyticsDetails.query.displayHierarchy:ON the I got following error: 'Annotations of & use hierarchies, but & does not have any [Analytics]'

For the same set up on another key column, this hierarchy set up works.

Is there a specific annotation that I have missed or we have some special rules about only specific key column are allowed to have 'displayHierarchy' set as 'ON'