I have a weird problem with a course in topic format.
Topic no. 14 and 15 can't be hidden, neither moved and if I add resources or activities, even if they exist in their category in the course, they don't appear in the topic.
In I create a new topic, no 16, it works normally but if I move it to become no 15 problems appears again.
If I can't fix it how can I delete totally a topic from the database?