If you are operating in a bureaucratically regulated environment such as India, having the revision numbers on a Sales Invoice just invites a lot of trouble. Here’s how you can make a Sales Invoice that needs correction into the corrected invoice but with the same number as the original.
Plus you can adopt a simpler naming series that does not add up to 16 characters. Like say 10, including the series, so that you don’t have to worry about the revisions.