In the example, there is one line in the sales order. Three packing slip were created using this order. Packing slip IRS275155 could be invoiced on 09.03.2024. When attempting to invoice packing slip IRS275156, the system took into account the "invoice issue due date" value of the first packing slip and returned an error.

Summary: When multiple packing slip are created from the same order and these packing slip are invoiced separately, the system considers the "invoice issue due date" value of the smallest packing slip. This behavior is incorrect. The system should consider the "invoice issue due date" value of the packing slip used in the invoice.