I am not surprised that it is a custom field although it wasn't showing up in section marked "Custom" in the version I access. The challenge I have is that I want to create an export at one level that includes the parent WSJF Score for each item. I am not aware of a method to display a column that contains parent info using the Custom List app (have yet to see a column selection that includes parent info and not sure if you can create columns that are not in the list of choices). If someone has a method for showing parent info in a Custom list, I would be glad to hear it.