其它入库单提交的时候报错

其它入库单成功保存后下推的时候保存的时候报错。能麻烦看看是什么原因吗？

下面是下推的JSON：
{"Creator":"三方调用者标识","NeedUpDateFields":["FBILLNO","FBillTypeID","FStockOrgId","FDate","FDocumentStatus","FSUPPLIERID","FDEPTID","FNOTE","STK_MISCELLANEOUS__FEntity","FMATERIALID","FUnitID","FQty","FSTOCKID","FPrice","FAmount","FEntryNote","FBASEQTY"],"Model":"QTRK168829"}

下面是返回的错误信息：
{
"Result": {
"ResponseStatus": {
"Message": "Object reference not set to an instance of an object.",
"StackTrace": " at Kingdee.BOS.Business.Bill.OperationService.OperationUtil.GetPkByNumbers(Context ctx, BusinessInfo info, IEnumerable numbers, Int32 createOrgId)\r\n at Kingdee.BOS.Business.Bill.OperationService.AbstractStatusConvert.GetPKs()\r\n at Kingdee.BOS.Business.Bill.OperationService.AbstractStatusConvert.ExecuteBillOperation(List`1 paras, OperateOption option)\r\n at Kingdee.BOS.Business.Bill.OperationService.Audit.Execute()\r\n at Kingdee.BOS.Web.Bill.BillWebService.ExcuteOperation(DynamicServiceModel model, String opNumber, Object request)",
"IsSuccess": false
}
}
}