I will look into that! Thanks for reporting.
The core product is "locked" and creating your own version of the NPCs is by cloning them. This is by design and guidance from SW if my memory serves me well. When we update module in order to get the updates you have to "revert changes", i.e you will lose all modifications unless you have cloned the NPCs or the object. The adventures are not read-only as per the same guidance.