HomeKit doesn't work after moving

Hello everyone. After our move, we set up a new network. Now I’m trying to get everything smart again. Unfortunately, I can no longer add my openHAB to Apple Home via the HomeKit add-on.

I keep getting the error message: “Device already belongs to another home.”

I’ve already removed the add-on several times, restarted the Raspberry Pi, and re-added the add-on.

I’m stuck.

The homekit.jsn file is always there, too. I can’t delete it because it says I don’t have permission to do so, even though I am an administrator.

Can anyone help me?

Thanks in advance.