Tags on Client list. Some clients not taggable Max BR1 Pro

Why do some of the clients not seem to be able to be tagged? How do you change that? See attached image. The clients in blue boxes do not appear taggable which hinders port assignment. I don’t see why either of the three without tags are that way. Not setup any different than the tagable ones

Never mind. I figured out the tag just means it has a DHCP reservation.