InsertOrUpdate操作失败，因为表CustomerCarData中不存在主键 返回

如题 ， body中为插入数据 

请求参数:{"body":{"Sysno":0,"CustomerID":1,"BrandID":8,"BrandName":"本田","PlateNum":"京C123","ColorCode":"#800080","ColorName":"紫色","Models":1,"Status":1,"InDate":"2017-04-10T23:07:51.0378253+08:00","EditDate":"2017-04-10T23:07:51.0378253+08:00"},"header":{"uid":1,"device":0}}

下面是生成的表sql语句，不知道为什么报错

CREATE TABLE [dbo].[T_Cutomer_Car](
[Sysno] [bigint] IDENTITY(1,1) NOT NULL,
[CustomerID] [bigint] NOT NULL,
[BrandID] [int] NOT NULL,
[PlateNum] [nchar](10) NOT NULL,
[ColorCode] [varchar](7) NOT NULL,
[ColorName] [nvarchar](10) NOT NULL,
[Models] [tinyint] NOT NULL,
[LastServiceDate] [datetime] NULL,
[Status] [tinyint] NOT NULL,
[InDate] [datetime] NOT NULL,
[InUser] [nvarchar](50) NOT NULL,
[EditDate] [datetime] NOT NULL,
[EditUser] [nvarchar](50) NOT NULL,
 CONSTRAINT [PK_T_Cutomer_Car] PRIMARY KEY CLUSTERED 
(
[Sysno] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]