"Should not have additional property" error even though I am following the example

Hello everyone, i am trying to add schema and I keep getting error that I have additional property even though I am following the pattern which has been shown here on the website

https://swagger.io/docs/specification/adding-examples/

I am trying to add schema the following way as shown here on swagger site

The 2nd picture shows my error. Can you please tell me why I am getting error and how to fix it.

 

Thanks