Hi @myriam
Could you poss. add these suggestions to the Properties - wishlist page (
Properties (e.g. certified organic) - wishlist)
as that’s where desired new things are being collected 
re. removing your duplicate property from products - hmmmm - I suspect this
is one where I’d ask one of the guys to pull a list from the database for
me. Assuming that’s not an option, it’s a bit onerous (depending on how
many products poss. have had this happen) but I suspect you could create a
giant order cycle and then use the filters in the shop to identify them?
This might be workable if there are only a few possible producers since the
error?
Perhaps also if you could put a note in the super-admin user guide to be
careful of this for now?