Unable to activate ZigBee and Z-Wave

I have hassio running on Pi4. I have Z-Wave dongle and it was working well on USB 2.0. ( Z-Wave.Me USB Stick incl. Z-Way Controller Softw - Z-Wave Plus).

Then I bought Wireless Zigbee CC2531 and flashed CC2531_DEFAULT_20190608.

I installed MQTT broker.

Now Z-Wave is not working anymore. Why they have conflict?

Now Zigbee2MQTT is working but z-wave not more. Why

Show your config. I suspect they try to use the same port.

Yes you were correct. I assigned the correct port to zigbee2mqtt. I never assigned the port to Z-Wave. (Before I had only Z-wave usb, so it was working.)

Thank you.