How to handle the error - "Waybill already generated for this credit reference number"?

This error means that a shipment has already been created using the provided customer reference number. It is a validation measure to prevent duplicate shipments.

To continue, you can either slightly modify the existing customer reference number—for example, by adding a character or number—or use a completely different, unique reference.

Note: Each shipment must have a unique customer reference number. You may use an order ID, invoice number, or any other unique identifier. Each shipment must have a unique customer reference number. You may use an order ID, invoice number, or any other unique identifier.

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