Because even if their ticket media is invalid, and even if you deactivate any Magic Bands, they still are considered "active." You can call Disney IT (via guest services) and have them removed.
Thanks for this tip! I wasn’t able to remove from the laptop but I could on the appI was able to remove people on my list via the app because I kept getting the same error you got when I logged in on my PC.

Thx, worked for me too!I was able to remove people on my list via the app because I kept getting the same error you got when I logged in on my PC.
Thx, worked for me too!
Using the advice on this thread (use the app, and deactivate magic bands) I was able to remove 7 of the 8 people I don't want on my list. Just my brother-in-law is left. Why will you not leave the list, MIKE, why??? LOL.