Yes, this has been and still is a problem with Workfront that we've struggled with in the past. There is a feature request to be able to disable queue topics instead of delete them, but there's been no progress on it yet. My suggestion would be to create a calculated field that captures the queue topic, make sure that field gets data for your old requests, then delete the queue topic so you have the info somewhere. Not ideal, but a stopgap for now. Darren Harper