Notification
There is already a sales booking for this invoice number.
Translation: Voor dit factuurnummer bestaat al een verkoopboeking.
Cause
If you receive the message "There is already a sales booking for this invoice number" in the integration, it means that a sales booking already exists in Exact Online.
Solution
In principle, you can ignore this notification. However, if you still wish to create a new sales booking in Exact (since the integration cannot update an existing sales booking), we recommend deleting the existing booking and synchronizing the invoice/order again through the integration.