Some how old servers and users have shown up on my plex server as well. Some users say that I’m sharing 60 libraries with them even though I currently only have 12 libraries.
Go to account>authorized devices and delete all the old stuff. This fixed it for me. You can always change the password to you your plex account and check the box that says sign out of all devices and then sign in again.
Its two servers that appeared to my account which isn’t reachable - ( red triangle ) . Dont know the servers , nor can I remove them. Dont have any remove option. They appear right under my own server.