Null values not allowed for StateMachine ResultPath

[forest-benchling]

cfn-lint version: (cfn-lint --version)
0.35.1

Description of issue.
I have an AWS::Serverless::StateMachine resource with a state like this:

          MarkRunCompleted:
            Type: Task
            Resource: !GetAtt UpdateRunStatus.Arn
            Parameters:
              run_id.$: $.run.id
              status: RUN_COMPLETED
            ResultPath: null  # Don't pass output
            Next: NextStep

When I run poetry run cfn-lint template.yaml, it fails with

E0000 Null value at line 594 column 25
template.yaml:594:25

I am confused because in the CloudFormation docs, it says that ResultPath can be set to null to pass the original input as the output.

Is this a bug?

Even if I do poetry run cfn-lint template.yaml -i E0000, it still fails with the same error.

[PatMyron]

Even if I do poetry run cfn-lint template.yaml -i E0000, it still fails with the same error.

This part is being tracked here

[kddejong]

Duplicate to #1657