Enable CORS-Policy AWS API Gateway "invalid response status code specified"

I'm trying to enable CORS Policy on AWS Apigateway. I have done this before and it worked perfectly. But now, while i copied all the configurations correctly i still cannot enable CORS-Policy. AWS is complaining, because there is an invalid response status code specified for the get method. However i configured it so it doesn't make sense. I also deployed my changes multiple times. I had this problems already in the past.
I'm a little bit lost here, since i don't know if my configuration is wrong or it's just aws being aws. First picture is the error i get. Second picture shows overview of the GET Method and third picture is the detailed configuration of the GET method response.