if  serverproperty('servername')  <>  @@servername  
begin  
           declare  @server  sysname  
           set  @server  =  @@servername  
           exec  sp_dropserver  @server  =  @server  
           set  @server  =  cast(serverproperty('servername')  as  sysname)              
           exec  sp_addserver  @server  =  @server  ,  @local  =  'LOCAL'  
end

------解决方案--------------------

SQL code
执行下面的代码，将@@SERVERNAME的值修改为与SERVERPROPERTY('ServerName')一样即可。修改完成后，需要重新启动MSSQLSERVER服务使修改生效。
IF SERVERPROPERTY('ServerName')<>@@SERVERNAME
BEGIN
    DECLARE @srvname sysname
    SET @srvname=@@SERVERNAME
    EXEC sp_dropserver @server=@srvname
    SET @srvname=CAST(SERVERPROPERTY('ServerName') as sysname)
    EXEC sp_addserver @server = @srvname , @local = 'LOCAL'
END