For what I can see this note already exists:
https://en.numista.com/catalogue/note360799.html
As this note:
The only difference in the pictures are the signatures.
I suggest the top note gets erased and the owners moved to the bottom note's b-line of issue. If no one protest at least? :)
Source:
http://www.banknote.ws/COLLECTION/countries/AUS/NCD/NCD0037.htm