400 error for invalid field 'City' in event post (data/attributes/profile/data/attributes/location/city)

I’m updating/testing our POST event for a placed order call.  I’ve been stepping through some errors and fixing them.  However, this one doesn’t make sense to me:

Filecontent: {"errors":[{"id":"259b79a7-d644-45e4-a4d9-4785397cb306","status":400,"code":"invalid","title":"Invalid input.","detail":"'City' is not a valid field for the resource 'profile'.","source":{"pointer":"/data/attributes/profile/data/attributes/location/City"},"links":{},"meta":{}}]}

According to the Create Event documentation (https://developers.klaviyo.com/en/reference/create_event) ‘City’ should be a valid field, inside the location object.  So, I don’t know why I’m getting this error returned. 

Any help would be greatly appreciated here.

Thanks!