Use Case List From...(not showing one of the available modules)

Dear CommCare Users,
I am trying to add a module that should require the user to select the
parent case first and then drill-down to child cases. The issue I have is
that I can see all other modules(older) in the options for “Use case list
from”, but I can’t see the newly created module which actually creates the
parent cases I want linked!

Would you advise what I may have been missing?

Thanks and kind regards,
Chaiwa.