Message Type: Integration-related - Visma Admin.

Reason: One of the line items is already being used on another invoice, which prevents you from posting the current invoice.

Action: Restart the invoice and link it again. You may need to re-enter the line items in Visma.

If this does not resolve the issue, please contact us at the MediusGo Customer Center directly via the support button on the invoice or through the customer portal.