问AWS CloudFormation忽略现有资源

EN

  VPCEndpoint:
    Type: AWS::EC2::VPCEndpoint
    Properties:
      ServiceName: !Join
        - ''
        - - com.amazonaws.
          - !Ref 'AWS::Region'
          - .execute-api
      PrivateDnsEnabled: true
      SecurityGroupIds: 
        - !Ref 9SecurityGroupId
      SubnetIds: 
        Ref: 8SubnetIds
      VpcEndpointType: Interface
      VpcId: 
        Ref: 7VpcId
  
  APIGateway:
    Type: AWS::ApiGateway::RestApi
    Properties:
      Name: !Ref 1Name
      EndpointConfiguration:
        Types:
          - PRIVATE
        VpcEndpointIds:
          - !Ref VPCEndpoint
      Policy:
        Statement:
          - Action: 'execute-api:Invoke'
            Effect: Allow
            Principal: '*'
            Resource: 'execute-api:/*'
          - Action: 'execute-api:Invoke'
            Condition:
              StringNotEquals:
                'aws:SourceVpce': !Ref VPCEndpoint
            Effect: Deny
            Principal: '*'
            Resource: 'execute-api:/*'
        Version: 2012-10-17