How to prevent updating of Ikea bulb?

Hi There, I have an Ikea zigbee bulb and I can control it via zigbee. BUT: sometimes it wants to update, this seem to fail somehow and then is is switched on without beeing told to switch on - how can I get rid of this behavior? I mean it works, i dont need any update…

log shows:

$ sudo journalctl -u zigbee2mqtt.service -f-- Logs begin at Fri 2020-10-09 13:38:39 BST. --
Oct 09 16:52:16 watchdog npm[820]: Zigbee2MQTT:info  2020-10-09 16:52:16: MQTT publish: topic 'zigbee2mqtt/IkeaLampe', payload '{"brightness":0,"color":{"x":0.4599,"y":0.4106},"color_temp":370,"linkquality":110,"state":"OFF","update_available":true}'
Oct 09 16:52:16 watchdog npm[820]: Zigbee2MQTT:info  2020-10-09 16:52:16: MQTT publish: topic 'zigbee2mqtt/bridge/log', payload '{"message":"Update of 'IkeaLampe' failed (Request failed with status code 434)","meta":{"device":"IkeaLampe","status":"update_failed"},"type":"ota_update"}'
Oct 09 16:52:16 watchdog npm[820]: Zigbee2MQTT:error 2020-10-09 16:52:16: Update of 'IkeaLampe' failed (Request failed with status code 434)
Oct 09 16:52:19 watchdog npm[820]: Zigbee2MQTT:error 2020-10-09 16:52:19: Failed to call 'OTAUpdate' 'onZigbeeEvent' (Error: Request failed with status code 434
Oct 09 16:52:19 watchdog npm[820]:     at createError (/opt/zigbee2mqtt/node_modules/zigbee-herdsman-converters/node_modules/axios/lib/core/createError.js:16:15)
Oct 09 16:52:19 watchdog npm[820]:     at settle (/opt/zigbee2mqtt/node_modules/zigbee-herdsman-converters/node_modules/axios/lib/core/settle.js:17:12)
Oct 09 16:52:19 watchdog npm[820]:     at IncomingMessage.handleStreamEnd (/opt/zigbee2mqtt/node_modules/zigbee-herdsman-converters/node_modules/axios/lib/adapters/http.js:244:11)
Oct 09 16:52:19 watchdog npm[820]:     at IncomingMessage.emit (events.js:327:22)
Oct 09 16:52:19 watchdog npm[820]:     at endReadableNT (_stream_readable.js:1220:12)
Oct 09 16:52:19 watchdog npm[820]:     at processTicksAndRejections (internal/process/task_queues.js:84:21))
Oct 09 16:52:39 watchdog npm[820]: Zigbee2MQTT:info  2020-10-09 16:52:39: MQTT publish: topic 'zigbee2mqtt/TempSensor', payload '{"battery":86,"humidity":62.62,"linkquality":120,"pressure":1013.2,"temperature":20.97,"voltage":2975}'