CodePipeline: Action configuration for action '2ndSource' contains unknown configuration 'PollForSourceChanges' – Amazon Web Sevices

There is AWS CodePipeline based on two Github source. Requirement is to restrict the pipeline auto trigger for primary source only. Found this snippet from terraform aws samples to disable auto trigger.

I tried the same but getting error (Tested with latest hashicorp/aws "4.57.1" version too) –

Error: updating CodePipeline (xxxx): InvalidActionDeclarationException: Action configuration for action ‘2ndSource’ contains unknown configuration ‘PollForSourceChanges’

terraform {
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "~> 4.57.1"
    }
  }
}

resource "aws_codepipeline" "service" {
  name     = "${var.environment}-${var.name}"
  role_arn = var.codepipeline_role_arn

  artifact_store {
    location = "${var.aws_s3_bucket_id}"
    type     = "S3"
  }

  stage {
    name = "Source"
    action {
      name             = "Source"
      category         = "Source"
      owner            = "AWS"
      provider         = "CodeStarSourceConnection"
      version          = "1"
      output_artifacts = ["source"]

      configuration = {
        ConnectionArn    = var.codestarconn_role_arn
        FullRepositoryId = var.source_location
        BranchName       = var.source_version
      }
      run_order = "1"
    }

    action {
      name             = "2ndSource"
      category         = "Source"
      owner            = "AWS"
      provider         = "CodeStarSourceConnection"
      version         = "1"
      output_artifacts = ["source2"]

      configuration = {
        ConnectionArn    = var.codestarconn_role_arn
        FullRepositoryId = var.deploy_repo
        BranchName       = var.deploy_branch
        PollForSourceChanges = "false" // ---->> Throwing error
      }
      run_order = "2"
    }
  }
}