A few months ago I set the option on User Preference to watching or tracking some categories by default.
After I found out that those changes are not retro-active. So when I deleted the categories list, those changes are active only for new users.
Now I see the forum is sending a very high numbers of mails from the categories watched/tracked.
How can I reset those change?
I cannot delete the watched/tracked categories from each user profile because they are about 2500!
So I want reset those settings for all users, and then, every active user can add his favourite category again from their profile.
Is there a way to do that?