Cannot Modify Subscription After The Migration From RS2000 To RS2005

We successfully migrated our RS2000 to RS2005. But we run into an issue €“ trying to modify an existing subscription that was created on RS2000 (We do not have this problem if the subscription is created on RS2005).

The error message is:

An internal error occurred on the report server. See the error log for more details. (rsInternalError) Get Online Help.
The specified @name (€˜B3F7CB60-6636-4F67-93CF-B94C052DFD29€™) already exists.

The call stack is:
w3wp!library!d!02/05/2007-14:31:10:: e ERROR: Throwing Microsoft.ReportingServices.Diagnostics.Utilities.InternalCatalogException: An internal error occurred on the report server. See the error log for more details., ;
Info: Microsoft.ReportingServices.Diagnostics.Utilities.InternalCatalogException: An internal error occurred on the report server. See the error log for more details. ---> System.Data.SqlClient.SqlException: The specified @name ('B3F7CB60-6636-4F67-93CF-B94C052DFD29') already exists.
at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result)
at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe)
at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
at Microsoft.ReportingServices.Library.InstrumentedSqlCommand.ExecuteNonQuery()
at Microsoft.ReportingServices.Library.SqlAgentScheduler.CreateTask(Task task)
at Microsoft.ReportingServices.Library.SqlAgentScheduler.UpdateTask(Task task)
at Microsoft.ReportingServices.Library.SchedulingDBInterface.UpdateTaskProperties(Task task, Boolean updateSqlAgentSchedule)
at Microsoft.ReportingServices.Library.TimedSubscriptionHandler.ValidateSubscriptionData(Subscription subscription, String subscriptionData)
at Microsoft.ReportingServices.Library.SubscriptionManager.ValidateSubscriptionData(Subscription subscription, String eventType, String subscriptionData)
at Microsoft.ReportingServices.Library.SubscriptionManager.SetSubscriptionProperties(Guid id, String eventType, String matchData, ExtensionSettings extensionSettings, String description, ParameterValueOrFieldReference[] parameters, DataRetrievalPlan dataSettings)
at Microsoft.ReportingServices.Library.RSService._SetSubscriptionProperties(String subscriptionID, ExtensionSettings extensionSettings, String description, String eventType, String matchData, ParameterValueOrFieldReference[] parameters, DataRetrievalPlan dataSettings)
at Microsoft.ReportingServices.Library.RSService.SetSubscriptionProperties(Guid batchId, String subscriptionID, ExtensionSettings extensionSettings, String description, String eventType, String matchData, ParameterValueOrFieldReference[] parameters, DataRetrievalPlan dataSettings)
--- End of inner exception stack trace ---

The error message is raised from the stored procedure sp_verify_job:

-- NOTE: We allow jobs with the same name (since job_id is always unique) but only if
-- they originate from different servers. Thus jobs can flow from an MSX to a TSX
-- without having to worry about naming conflicts.
IF (EXISTS (SELECT *
FROM msdb.dbo.sysjobs
WHERE (name = @name)
AND (originating_server = @originating_server)
AND (job_id <> ISNULL(@job_id, 0x911)))) -- When adding a new job @job_id is NULL
BEGIN
RAISERROR(14261, -1, -1, '@name', 'name')
RETURN(1) -- Failure
END

which is called by another stored procedure sp_add_job.

Question:
Is there anyway that I can workaround this issue? Or is there anyway that I can re-create existing report server subscriptions (I have 300+ subscriptions) programmatically.

Please help.

Bobby Fu