AWSのポリシーの変なエラー

「The policy failed legacy parsingっ」てエラー ポリシー作るときに出てきた。

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "iam:AttachRolePolicy",
                "iam:GetRole",
                "iam:CreateRole",
                "iam:PutRolePolicy",
                "apigateway:*",
                "cloudformation:*",
                "events:*",
                "lambda:*",
                "logs:*"
            ],
            "Resource": "*"
        },
        {
            "Effect": "Allow",
            "Action": "iam:PassRole",
            "Resource": "arn:aws:iam::[myaccountid]:role/*-ZappaLambdaExecutionRole"
        },
        {
            "Effect": "Allow",
            "Action": "s3:*",
            "Resource": "arn:aws:s3:::zappa-*"
        }
    ]
}

[myaccountid]を[123456789]みたいに書いてしまってたが、 [と]のせい