Search Console Has Changed The Way That It Evaluates And Reports Errors In Event Structured Data
https://support.google.comSearch Console has changed the way that it evaluates and reports errors in Event structured data.
As a result, you may see small increases in the number of Event entities and issues reported for your property, as well as a change in severity of some issues from errors to warnings. Specifically, Search Console is now detecting Event entities at all hierarchy levels, not just at the root level, and errors in recommended properties are now flagged as warnings rather than errors.