Why do I get an error when I call the developers.getBalance api?

[LionelWong]

Here's the full error message.

{
  "error": {
    "code": 500,
    "message": "io.apigee.quota.exception.CustomIntervalExceedsLimitException: Interval for CUSTOM type cannot exceed 1.5 years",
    "status": "INTERNAL",
    "details": [
      {
        "@type": "type.googleapis.com/google.rpc.PreconditionFailure",
        "violations": [
          {
            "subject": "[2002:a17:90a:8983::]:4098:tloe22-20020a96d096000000b00263e7a6807d:9801:51338:58143027",
            "description": "io.apigee.quota.exception.CustomIntervalExceedsLimitException: Interval for CUSTOM type cannot exceed 1.5 years"
          }
        ]
      },
      {
        "@type": "type.googleapis.com/google.rpc.RequestInfo",
        "requestId": "17467091409643841006"
      }
    ]
  }
}