Hi,

This message is shown because an enrollment rule with that tag id was deleted and some devices try to enroll with that rule.

You could try to enroll with another rule or create a new enrollment rule and asign that id to the rule clicking the Advanced button and editing the tag

I've created a new add device rule and assigned the tag ID I've mentioned.

No devices got enrolled but the error messages are gone.

I deleted the new rule again and the error messages are still not showing up again.

Seems like this is fixed.

Thank you for the help!