E3012 Property should be of type Json - incorrectly flagging official examples

cfn-lint version: 0.51.0 Description of issue. After upgrading to 0.51.0 today, we are now seeing new lint issues. Specifically E3012 Property should be of type Json on the parameters section of AWS::SSM::Association

Even the example from the official docs is flagged by cfn-lint now. e.g.

Resources:
  SpecificInstanceIdAssociation:
    Type: AWS::SSM::Association
    Properties:
      Name: AWS-RunShellScript
      Targets:
      - Key: InstanceIds
        Values:
        - i-1234567890abcdef0
      Parameters:
        commands:
        - ls
        workingDirectory:
        - "/"
      WaitForSuccessTimeoutSeconds: 300

E3012 Property should be of type Json at Resources/SpecificInstanceIdAssociation/Properties/Parameters/commands test.yaml:11:9 E3012 Property should be of type Json at Resources/SpecificInstanceIdAssociation/Properties/Parameters/workingDirectory test.yaml:13:9

[kddejong]

@evilensky that can be the same template? Maybe a spacing issue. That template gives me

E3001 Type not defined for resource ResourceName
local/issue/2063-1.yaml:2:3

I’m guessing you meant

Resources:
  ResourceName:
    Type: AWS::SSM::Parameter
    Properties:
      Description: Human Readable Description
      Name: /path/of/param
      Tags:
      - {Key: ENVIRONMENT, Value: test}
      - {Key: RESOURCE_NAME, Value: broker_dns_addresses}
      - {Key: STACK_NAME, Value: example-service}
      Type: StringList
      Value: ValueOfParam

Putting in another fix for that

[kddejong]

Not sure what started the issue as that rule didn’t change but a list is still valid json and we should consider it so. Fixing the issue inside E3012