问错误14274 -无法删除和重新添加作业

EN

USE [msdb];

SET NOCOUNT ON;

DECLARE @JobName NVARCHAR(128);
DECLARE @ReturnCode INT;
declare @errCode INT;

SET @JobName = 'AJob';

BEGIN TRANSACTION;

DECLARE @jobId uniqueidentifier;

SET @jobId = (SELECT job_id from msdb.dbo.sysjobs where name = @JobName);

IF(@jobId IS NOT NULL) -- delete if it already exists
begin
   EXEC @ReturnCode = msdb.dbo.sp_delete_job @job_id=@jobId
   IF(@@ERROR <> 0 OR @ReturnCode <> 0)
    begin
        set @errCode = @@ERROR;
        GOTO QuitWithRollback;
    end
    print 'deleted job';   
end


-- create the job
EXEC @ReturnCode = msdb.dbo.sp_add_job @job_name=@JobName,
        @enabled=1,
        @notify_level_eventlog=0, -- on failure
        @notify_level_email=0,
        @notify_level_netsend=0, -- never
        @notify_level_page=0,
        @delete_level=0,
        @description=NULL,
        @owner_login_name=N'sa',
        @notify_email_operator_name=NULL,
      @job_id = @jobId OUTPUT
IF(@@ERROR <> 0 OR @ReturnCode <> 0)
begin
    set @errCode = @@ERROR;
   GOTO QuitWithRollback;
end
print 'added job';

-- Server
EXEC @ReturnCode = msdb.dbo.sp_add_jobserver
   @job_id = @jobId
IF(@@ERROR <> 0 OR @ReturnCode <> 0)
   GOTO QuitWithRollback;

COMMIT TRANSACTION;
RETURN;

QuitWithRollback:
   IF(@@TRANCOUNT > 0)
      ROLLBACK TRANSACTION;
   print 'Err: ' + CAST(@errCode AS varchar(10)) + ' ret: ' + cast(@ReturnCode as varchar(10));