无法在AWS SES上设置停止操作

Question

 SESReceiptRule1:
  Type: AWS::SES::ReceiptRule
  Properties:
    RuleSetName: !Ref ReceiptRuleSet
    Rule:
      Name: !Ref ReceiptRuleName1
      Enabled: true
      Recipients:
      - !Sub administrator@${DomainNamePublic}
      - !Sub postmaster@${DomainNamePublic}
      - !Sub webmaster@${DomainNamePublic}
      ScanEnabled: true
      TlsPolicy: !Ref TlsPolicy
      Actions:
      - SNSAction:
          TopicArn: !Ref ValidationEmailTopic
          Encoding: UTF-8
      - StopAction:
          Scope: RuleSet
          TopicArn: !Ref ValidationEmailTopic

但是当我尝试启动它时，出现以下错误消息：

停止操作（如果有）必须放在操作列表的末尾（服务：AmazonSimpleEmailService；状态代码：400；错误代码：InvalidParameterValue；请求ID：943f1401-f18b-11e8-95c1-4b550d223892）