Fixed
- Correcting an invoice no longer breaks off. Correcting an issued invoice creates a cancellation credit note in the background. That credit note did not carry over a position’s category — so for positions without a linked product (a service fee, or a deduction line for a deposit), the category stayed empty. The credit note’s PDF could then not be produced: the correction failed with an error, the invoice stayed uncancelled, and a leftover credit-note draft remained. The credit note now copies every position’s category one to one from the invoice — for a full cancellation as well as a partial one.