The number range %CUMUL_NUMBER (invoice) refers to the number of invoices that have already been issued and not to the number of the advance invoice, which can be edited freely. If competitions are won, we must include the i.d.R competition fee that has already been settled in the cumulative invoicing. Although this calculation is the first in order, it is not the first AR. The first AR is the first invoice after the order has been placed, so there is always a difference in the numbering.

Not just important, but it would make everyday life easier not to have to adjust it by hand every time.