I created an invoice, lets say with number 300, and before saving it, my computer was powered off.
When i tried to create it again, the invoice number was 301 and i couldn’t create the invoice 300.
Is it possible to delete the invoice 300 in order to have invoice consistency ?
You would need to update the invoice to have a different number (ie, 300-DELETED) and then delete it, that would free up the number for uses in a different invoice.