Thank you, Wal!
Users can edit their posts, for example to delete the entire content and to add something like “This topic is no longer available”.
Before it used to be a moderator and for this specific category he was deleting posts older than 6 months.
Now that person is no longer in charge and we wouldn’t like to grant full moderator access to the ones who will be responsible of deleting topics from this category. We would want them to manage only that category as a Moderator, but on other categories to don’t have Moderator permissions.
I think @JammyDodger provided a solution. I will check that.