I'm tying to limit some users to avoid customers to be deleted, therefore my understanding is that the goup they belong should not have this access right.

As an example, i have a user belonging only to the group "Sales / See own leads", this group by default has no deletion rights over Partners, and as far as I see the inherited groups don't have it either.

The problem is that even if they don't have this access right, the users are able to delete customers. ¿Is this a known bug or I'm doing something wrong?