section09 포트폴리오 git clone으로 받아와서 등록해보면 Failed to fetch 오류가 생기는데 이유가 뭔가요?

오류가 나옵니다

new:1 Access to fetch at 'http://backend-practice.codebootcamp.co.kr/graphql' from origin 'http://localhost:3002' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: The 'Access-Control-Allow-Origin' header has a value 'http://localhost:3000' that is not equal to the supplied origin. Have the server send the header with a valid value, or, if an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.

backend-practice.codebootcamp.co.kr/graphql:1

Failed to load resource: net::ERR_FAILED