Duplicate instances

I have this in my hivemqlog. Is this caused by duplicate hivemq instance? How can I find out? How to stop one? One is using TCP the other is using TCP6. I tried disable IP6 but it doesnt work. Please help.
2023-09-22 09:43:27,983 ERROR - Could not start TCP Listener on port 1883 and address Is it already in use?
2023-09-22 09:43:27,983 ERROR - Could not bind any listener. Stopping HiveMQ

netstat shows
tcp 0 0* LISTEN
tcp6 0 0 :::1883 :::* LISTEN

Hello @Susan ,

Thank you for the outreach!

This is likely based on the listener configuration that is currently set within your HiveMQ configuration file, located at /HiveMQ/conf/config.xml.

Information on this default configuration can be found here. This page also includes some basic details on configuring your broker for initial setup.

If you are looking to implement custom listeners, or make configuration adjustments to your existing listener, this page of our documentation provides all of the relevant listener details.

Aaron from the HiveMQ Team