Can't reset BinaryMediaTypes to a default value for API Gateway REST API about serverless-application-model HOT 2 CLOSED

AWSTemplateFormatVersion: 2010-09-09
Transform: AWS::Serverless-2016-10-31

Resources:
  MyApi:
    Type: AWS::Serverless::Api
    Properties:
      StageName: MyNewStageName

  TestFunction:
    Type: AWS::Serverless::Function
    Properties:
      Handler: index.handler
      Runtime: python3.8
      InlineCode: |
        import json
        def handler(event, context):
          return {'statusCode': 200, 'body': json.dumps('Hello World!')}
      Events:
        Get:
          Type: Api
          Properties:
            Path: /get
            Method: get
            RestApiId: !Ref MyApi

If you don't specify this property, a default value is chosen. For REST APIs created before March 29, 2021, the default is overwrite. For REST APIs created after March 29, 2021, the new API definition takes precedence, but any container types such as endpoint configurations and binary media types are merged with the existing API.