Hi @Michmbayed1 ,
Thanks for posting your question!
If you are using Plans hierarchy, you can follow this link to learn how to enable/setup the hierarchy - Plans custom fields
If this is a custom/additional hiearchy, I suggest reading this blog post How to create an additional issue hierarchy and you can also check out a video from eazyBI Community Days where hierarchy set up is also explained (starting from minute 16:30) - https://www.youtube.com/watch?v=IwGHU44T8Nw
Here you can read about the additional issue hierarchies in the documentation page - Additional Issue hierarchies
Note! The issue hierachies will only work when for issues with single parents. If there are two parents for an issue, the hierarchy won’t work.
Best wishes,
Elita from support@eazybi.com