Mosquitto: Connection Refused: not authorised

I’m having some weird log entries that i don’t quite understand.

First, some context: I’m using Mosquitto for 2 things:

  1. OpenZeave(Beta)
  2. Rooted Roborock with Valetudo

Every openzwave device works fine, so obviously something is getting through, but my vacuum is unavailable, and the HA logs is spammed with the following every 30 seconds:

2020-12-17 09:36:41 ERROR (Thread-5) [homeassistant.components.mqtt] Unable to connect to the MQTT broker: Connection Refused: not authorised.

2020-12-17 09:36:41 WARNING (Thread-5) [homeassistant.components.mqtt] Disconnected from MQTT server core-mosquitto:1883 (5)

I’m using the official mosquitto addon.