防止AWS CloudFormation使用IAM删除DynamoDB

我正在尝试创建一个AWS角色,该角色可以防止删除表。例如,我创建的表如下所示:

UsersDynamoDBTable:
    Type: AWS::DynamoDB::Table
    Description: Users DynamoDB Table
    Properties:
      AttributeDefinitions:
        - AttributeName: hashKey
          AttributeType: S
        - AttributeName: rangeKey
          AttributeType: S
      KeySchema:
        - AttributeName: hashKey
          KeyType: HASH
        - AttributeName: rangeKey
          KeyType: RANGE
      BillingMode: PAY_PER_REQUEST
      GlobalSecondaryIndexes:
        - IndexName: index-rangeKey
          KeySchema:
            - AttributeName: rangeKey
              KeyType: HASH
            - AttributeName: hashKey
              KeyType: RANGE
          Projection:
            ProjectionType: ALL

现在假设开发人员意外地删除了这些行并更新了堆栈。这样,表及其所有数据都将被删除。因此,我想创建一个角色,防止CloudFormation删除DynamoDB表。我的第一次尝试是创建下面的角色,但没有成功。

PreventCloudFormationDeleteTableIAMRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Version: 2012-10-17
        Statement:
          - Effect: Allow
            Principal:
              Service:
                - cloudformation.amazonaws.com
            Action:
              - sts:AssumeRole
      Policies:
        - PolicyName: PreventTableDeletePolicy
          PolicyDocument:
            Version: 2012-10-17
            Statement:
              - Effect: Deny
                Action:
                  - dynamodb:DeleteTable
                Resource:
                  - !Join
                    - '/'
                    - - !Join [':', ['arn:aws:dynamodb', !Sub '${AWS::Region}', '*', 'table']]
                      - !Join ['', [!Sub '${StackName}', '*']]

我是否缺少一些角色配置?