[@chrishajer Participant 16 years, 3 months ago]

I don’t think you can do it through the bbPress interface at all ( I could be wrong about that, but I’ve never seen it. ) You would have to modify it directly in the database. Using a tool like phpMyAdmin find the topic in the bb_topics table, and modify the topic_slug. Make sure the slug you select does not already exist – the slugs need to be unique.