[_ck_]

Since they share the same db on the same server it’s possible to write a custom mysql query to do the move behind bbPress’s back. This would be necessary because it’s impossible to load the core for both copies of bbPress to move the topic with the two APIs.

If you could use the API, it would be far, far easier of course, but since you are literally deleting the old topic in the 1st table and creating a new one in the 2nd table, it’s “safe”. New topic id is created and other data is not expected to carry over (other than the author id which is identical).

Email me the two different table names and I’ll try to come up with a custom query for you.