You can have multiple integrations referring to the same device. The IP might be unique, but there can be multiple entities and devices related to it. I have that all the time. If they all use the ip or mac as unique_id then there’s trouble. But what the unique_id should be is not the issue, it is that a custom integration failed to either set it or provide a means to assign one by you.
He doesn’t support it any more - dropped it.
Thank you to all for the information here. At least now I understand the issue.
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