Create BI with CustomSubject area crossed out.

The subject area is crossed out to create a BI.
One has the activity as the primary subject and
the second has theOpportunity as the primary subject.
When I add a “ResourceVOVA” item to the BI from a subject area that has the first activity as the primary subject, the sales stage of the negotiation is no longer available.
I am having trouble finding the cause of this problem.
Please let me know how to solve this problem.