如何使用CRM Dynamics 2013/2015中的插件更新CRM中的实体与相关实体

我是CRM的新手，我正在努力使用插件更新实体，我已经在PhoneCall实体上注册了一个插件，用于创建消息的预操作，然后当我查询有关实体并将有关实体的数据写入我的PhoneCall实体时，尽管我似乎得到了一个错误，即GUID xxxxx的记录不存在。

我的代码如下;

  public void Execute(IServiceProvider serviceProvider)
    {
        ITracingService tracingService = (ITracingService)serviceProvider.GetService(typeof(ITracingService));
        IPluginExecutionContext context = (IPluginExecutionContext)serviceProvider.GetService(typeof(IPluginExecutionContext));
        if (context == null)
        {
            throw new ArgumentNullException("localContext");
        }
        IOrganizationServiceFactory serviceFactory = (IOrganizationServiceFactory)serviceProvider.GetService(typeof(IOrganizationServiceFactory));
        IOrganizationService service = serviceFactory.CreateOrganizationService(context.InitiatingUserId);
        if (context.InputParameters.Contains("Target") && context.InputParameters["Target"] is Entity)
        {
            Entity phoneCallEntity = (Entity)context.InputParameters["Target"];
            if (phoneCallEntity.LogicalName != "phonecall")
                return;

            if (context.MessageName == "Create")
            {
                try
                {
                    QueryExpression qe = new QueryExpression("new_zoiperhistorydata");
                    qe.ColumnSet = new ColumnSet("new_regardingobjectid", "new_callduration");
                    var ZoiperData = service.RetrieveMultiple(qe);
                    if (ZoiperData != null && ZoiperData.Entities.Count > 0)
                    {
                        foreach (Entity entity in ZoiperData.Entities)
                        {
                            if (entity.Attributes.Contains("new_callduration"))
                                phoneCallEntity.Attributes["new_callduration"] = entity.Attributes["new_callduration"].ToString();
                        }
                    }
                    service.Update(phoneCallEntity);
                }
                catch (System.Exception ex)
                {
                    Console.WriteLine("The application terminated with an error.");
                    Console.WriteLine(ex.Message);
                    // Display the details of the inner exception.
                    if (ex.InnerException != null)
                    {
                        Console.WriteLine(ex.InnerException.Message);
                        FaultException<Microsoft.Xrm.Sdk.OrganizationServiceFault> fe = ex.InnerException
                            as FaultException<Microsoft.Xrm.Sdk.OrganizationServiceFault>;
                        if (fe != null)
                        {
                            Console.WriteLine("Timestamp: {0}", fe.Detail.Timestamp);
                            Console.WriteLine("Code: {0}", fe.Detail.ErrorCode);
                            Console.WriteLine("Message: {0}", fe.Detail.Message);
                            Console.WriteLine("Trace: {0}", fe.Detail.TraceText);
                            Console.WriteLine("Inner Fault: {0}",
                                null == fe.Detail.InnerFault ? "No Inner Fault" : "Has Inner Fault");
                        }
                    }
                }

            }

service.Update(phoneCallEntity)上的代码失败;