Fortnox error: 2002951

This error indicates that the integration platform is attempting to export or update an invoice in Fortnox that has already been marked as cancelled. Once an invoice is cancelled in Fortnox, it becomes locked for further modifications, resulting in an error when an update is attempted.

How to resolve the error

1. Invoice already cancelled in Fortnox

   Cause:
   The invoice that the integration platform is trying to update has already been marked as cancelled in Fortnox, locking it from further changes.

   Solution:
   Verify the invoice status directly in Fortnox:

   • Log into Fortnox and locate the invoice under Invoicing > Invoices.
   • Confirm that the invoice status is Cancelled.
   • Click Ignore in the Issue tracker for the specific invoice to ensure it is not included in future exports to Fortnox.

Summary:

The error occurs because the invoice is already cancelled and thus locked in Fortnox. Use the Issue tracker to exclude the specific invoice from future exports.