[@netweb Keymaster 10 years, 2 months ago]

Can you remove a page of topics at a time?

Go to the bbPress topics dashboard: http://example.com/wp-admin/edit.php?post_type=topic

From the dropdown select the forum you want to delete the topics from and click filter, now select the 20 topics from that forum and in the “Bulk Actions” dropdown select “Move to trash” and click apply.

Going back to the repair tools and running those has the forums topic and reply count now been reduced by the number of topics you just deleted?