Thread:Stimulate/@comment-26308699-20190324202933/@comment-26308699-20190324205734

But because it is a thread, other users answered so their posts would be deleted too. That's why I'm not allowed to delete it.

You can contact support and ask for a deletion. The thread was migrated from forum and isn't displayed as it should. Therefore, a deletion is probably the best option (but only staff are allowed to delete it in this case).

Read Help:Discussions to learn more about the feature. :)