How exactly are you injecting that?
The error says it cannot parse:
'NoT/device machine_working="true",tags=[object Object]'
The [object Object] is in the place your tags object should be - and that's what you get if you let JavaScript stringify an object without encoding it to JSON.
So to figure out why that's happening, we'd need to see a bit more of your flow that generates that JSON and how you pass it to the influxdb node.
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