MQTT integrations failed

Help I have no more mqtt (NOT the Mqtt broker Current version: 5.1) that goes!

System: HassOS 4.10
Supervisor: 227
Home Assistant 0.110.6

In the “configuration.yaml” I have deactivated everything about “mqtt”.->
#MQTT Broker Mosquitto
#mqtt:
#broker: !secret mqtt_address
#port: 1883
#username: !secret mqtt_user
#password: !secret mqtt_pass
#discovery: true
#discovery_prefix: homeassistant

All “mqtt” messages are received by the system, e.g.
Message 200 received on OpenZWave/1/node/2/statistics/ at 10:09:
Addendum: => since HassOS 4.10 the option mqtt is missing in the developer tools!

"sendCount": 39,
"sentFailed": 3,
"retries": 0,
"receivedPackets": 164,
"receivedDupPackets": 1,
"receivedUnsolicited": 131,
"lastSentTimeStamp": 1591734246,
"lastReceivedTimeStamp": 1591776389,

but the “Integartion” MQTT Mospuitto broker is empty!
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The next step -> mqtt integration deleted!
System -> Reboot!
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