How to rename openHAB to something else in Homekit?

I’m not sure if this is a Homekit configuration or a core openHAB setting, but I would like to know how I can rename “openHAB” to something else. Background:

For testing purposes, I have two openHAB servers in my network. I was trying to configure Homekit on my iPhone, but I am confused because it displays two devices “openHAB” and “openHAB (2)”, and it seems impossible to find out which is which. Hence, I would like to be able to rename one of them to something like “openHAB-test”. But I can’t find any hint about where that name comes from?

Found an issue for this. Following up there.