Unable to remove Config parameter in Redshift Serverless using CloudFormation

[NdemeraS]

When Configuration Parameters are removed from the Workgroup resource definition, CloudFormation will consider the update successful but the parameters will not actually be removed from the Workgroup

Replication

Deploy the following template to your CloudFormation stack

Resources:
  Workgroup:
    Properties:
      BaseCapacity: 16
      ConfigParameters:
        - ParameterKey: max_query_execution_time
          ParameterValue: '50'
        - ParameterKey: max_query_queue_time
          ParameterValue: '50'
      WorkgroupName: xxxxxxxxxxxxxxxxxxxxxxxxxx-rft-serverless-testwg-1
      NamespaceName: !Ref NamespaceName
    Type: 'AWS::RedshiftServerless::Workgroup'

  NamespaceName:
    Properties:
      NamespaceName: xxxxxxxxxxxxxxxxxxxxxxxxxx
    Type: 'AWS::RedshiftServerless::Namespace'

Update the template to remove any or all parameters from the ConfigParameters property of the Workgroup resource, deploy updated template as a stack update

Resources:
  Workgroup:
    Properties:
      BaseCapacity: 16
    #   ConfigParameters:
    #     - ParameterKey: max_query_execution_time
    #       ParameterValue: '50'
    #     - ParameterKey: max_query_queue_time
    #       ParameterValue: '50'
      WorkgroupName: xxxxxxxxxxxxxxxxxxxxxxxxxx-rft-serverless-testwg-1
      NamespaceName: !Ref NamespaceName
    Type: 'AWS::RedshiftServerless::Workgroup'

  NamespaceName:
    Properties:
      NamespaceName: xxxxxxxxxxxxxxxxxxxxxxxxxx
    Type: 'AWS::RedshiftServerless::Namespace'

Check the properties of the Workgroup resource using the get-workgroup CLI

{
    "workgroup": {
        "baseCapacity": 16,
        "configParameters": [
...
            {
                "parameterKey": "max_query_execution_time",
                "parameterValue": "50"
            },
            {
                "parameterKey": "max_query_queue_time",
                "parameterValue": "50"
            }
        ],
...
        "enhancedVpcRouting": false,
        "namespaceName": "xxxxxxxxxxxxxxxxxxxxxxxxxx",
...
        "workgroupArn": "arn:aws:redshift-serverless:us-east-2:1111111111:workgroup/3fe7c1bd-f70c-4884-a873-7bcea39010d7",
        "workgroupId": "3fe7c1bd-f70c-4884-a873-7bcea39010d7",
        "workgroupName": "xxxxxxxxxxxxxxxxxxxxxxxxxx-rft-serverless-testwg-1",
        "workgroupVersion": "1.0.63282"
    }
}