don't allow data nodes to move (explicitly, was previously raising error)
don't allow data nodes to move (explicitly, was previously raising error)

johnhbenetech/Vellum,esoergel/Vellum,mwhite/Vellum,johnhbenetech/Vellum,johnhbenetech/Vellum,mwhite/Vellum,johnhbenetech/Vellum