Why can't I add any of my existing [old] Maps/Apps to a new Collection?

[NSGICOrganization]

I only see the new Story Maps I've created as options to add to my collection.

[RobertBorchert]

Are you old maps in a personal geodatabase

[NSGICOrganization]

All Maps/Apps are in my AGOL My Content, but only "new" maps / apps show up when updating the Collection