This removes the udev rules that let LGL Keychron Helper access Keychron devices, including for firmware updates. You'll need to reinstall it (the app will offer to, automatically) before it can access a Keychron device again.
Note: if you are happy to continue, click Remove Device Permissions and you will be presented with your usual authentication window.
Fedora users: don't worry, permissions are taken care of for you. They're removed automatically when you uninstall the RPM. This button is only needed on other systemd-based Linux distros.
Approve the system prompt to continue.
Keychron devices will lose HID and firmware-update access the next time they are unplugged and reconnected.
This can happen if your desktop session has no permission-prompt tool available. You can run these commands in a terminal instead: