So today, after updating the forum plugin I was going through the new settings options. When I found the "Delete Forum Cache" tab on the front end. I clicked on the tab thinking it will delete the plugin cache but it ended up wiping all of my forum post without any warning.
Any Idea how to undone it?
There should not be such an issue.
Please leave your forum URL to allow us to check it.
Here is the forum url: https://watches.nerdhaunt.com/
Try clicking on any post, nothing will happen.
Tried twice, nothing happened but it does say there are some problems.
I am attaching the screenshot.
What you say is not possible. The [delete cache] button cannot delete your forums, so you've deleted your forums in other way. Just contact to your hosting service and ask for the database backup file or restoration. There is no other way to bring them back.