crm提示对象名CRM ProductUnit 无效

1、服务模块操作的时候提示：

--备份数据服务器上面执行脚本

---产品单位
IF NOT EXISTS(SELECT 1 FROM sysobjects WHERE id = OBJECT_ID(N'CRM_ProductUnit') AND OBJECTPROPERTY(id,N'IsUserTable')=1)
BEGIN
 CREATE TABLE CRM_ProductUnit(
        [ID] [INT] IDENTITY PRIMARY KEY  NOT NULL,
           [Name] NVARCHAR(50),
           [SortOrder] int default 0
 )

 exec('   INSERT INTO dbo.CRM_ProductUnit
        ( Name, SortOrder )
        SELECT DISTINCT Unit,0 FROM  CRM_Commodity WHERE ISNULL(Unit,'''') <> ''''  '  )

 exec('  UPDATE CRM_Commodity SET Unit = (SELECT ID FROM  dbo.CRM_ProductUnit WHERE Name = Unit)  WHERE  ISNULL(Unit,'''') <> '''' '  )

 END