Hi Anonymous20,
Could you please leave a screenshot of your wp_wpforo_topics table structure. We made lots of tests and didn't find such problem.
Does it happen with all unapproved topics? Is this a topic specific issue?
I don't see any issue with topic table. Do you remove the topic user before deleting the topic?
I have done every test i could, i even disabled all plugins. Same problem.
More details:
1. It happens ALL the time in ALL UNAPPROVED topics (for moderation, in Moderation Menu). And only with Delete. If i approve, and then delete there is no warning. And NO i don't delete any user, before (or after ...).
2. While The Topic delete error shows, the topic IS deleted.
3. If i Delete the unapproved item from the FORUM TOPIC line (and not from admin dashboard) there is no error.
4. Happens in two wpforo installations i manage.
5. There is nothing strange or weird in my sites, no errors and i haven't touched any db myself.
If you need to see it in action, you are welcome.
(if there a way to have a more detailed error description from that problem ? I could add some code if needed).