cancel and replace client invoice
It would be nice to have the feature to cancel&replace a client invoice.
This is useful to avoid creating a numbered credit note that doesn't need to be sent
when the mention is present in the new replacement invoice.
This functionality was present in OpenERP so it would be great to get it back (in Tryton).
By the way, in France, this is acceptable and somewhat common practice.
see para 210 in https://bofip.impots.gouv.fr/bofip/142-PGP.html