Saving new patches from preset edits

HI all, sorry for the noob question, but picked up a Digitone recently and loving it so far.
However I can’t figure out how to do this:

I’ve edited one of the sounds in an existing preset pattern and want to save it as it’s own sound, but when I go to save, it tells me it’s write protected.

How can I save this edited version of a preset to a new sound / pattern / project without saving over the old one? (not that it’s letting me)