i bought recently a Z-Wave USB Stick from aeotec. After i connected the stick to my RPI4 and configured the integration zigbee2mqtt went down. Is there known conflict in with combination running and connected to the same host.
I am using Home Assistant OS and bothe sticks were connected via a short USB cable to the RPI in order to avoid interferences.
If you did not use the by-id address for your stick then when you added another device to the USB Bus, the address your old stick was on may have changed. Which would cause the addin to stop - cant find the stick.
What was the address in your configuration file for the stick before you made the configuration change. What is the patth to the stick now?