Which line tells me which Zigbee device is causing this error?

[tom_l]

@PB97

how do I get the code below to format nicely on this forum

The </> button. Sometimes hidden under the cog menu on mobile devices. Or just surround your post with three backticks as explained in the FAQ.

@PB97

Which line in the message tells me which device or devices this relates to

It doesn’t tell you in those error messages. Are you using ZHA or Zigbee2MQTT?