Application Name: Unifi
Application Site: https://www.ubnt.com/download/unifi
Docker Hub: https://hub.docker.com/r/linuxserver/unifi/
Github: https://github.com/linuxserver/docker-unifi
Please post any questions/issues relating to this docker you have in this thread.
If you are not using Unraid (and you should be!) then please do not post here, instead head to linuxserver.io to see how to get support.
Yes, you can't adopt an AP in multiple controllers. You need to reset the AP to defaults before you can adopt it in another controller.
SSH into the AP and run the following command.
syswrapper.sh restore-default
The AP will restore to factory defaults and reboot. Once it reboots, reconnect and then run the commands in the previous post.