istio.io/content/en/docs/reference/config/analysis/ist0108/index.md

title	layout	owner	test
UnknownAnnotation	analysis-message	istio/wg-user-experience-maintainers	n/a

This message occurs when you attach an unrecognized annotation in the format *.istio.io to a namespace.

Istio only recognizes certain annotation names.

To resolve this problem, check the name of your annotation and try again.