So this is kind of a weird one but I just installed NPSP into an org which had a pre-existing (umanaged, unpackaged) object called Household (with an API name of Household__c). After installing NPSP, I noticed that the Manage Household VF page controller was referencing this same API name, not "npo02__Household__c".
I noticed this in particular when I went to delete the old unmanaged object and got an error saying that it's being referenced by this VF page. How is this possible?
@Nonprofit Success Pack, @Nonprofit Hub답변 9개

npo02__manageHousehold is from the old Household package. The newer Household package used with NPSP3 has those old pages removed, so you can delete them.