Old information on MQTT server

Is there any way to clean the cache of the integrated MQTT browser? When I subscribe to # there are several “Connection lost” messages from old devices ad test setups:

How do I get rid of those? Stopping openhab and cleaning the cache did not work.

1 Like

You’re not using mosquitto, but the principle in “part two” of that linked post will still serve you.
Use an external tool like mqtt.fx to manually send new messages to replace your troublesome topics, without ‘retain’ set.

Actually that won’t clear the retained messages. The new messages without the retained flag set won’t replace the retained message. Instead, one needs to send an empty message with the retained flag set to clear out the old message.