SAP Message VLA059 - Follow-up documents exist (check long text)

Diagnosis
The delivery was invoiced before the confirmation of the deliveryrecpeipt confirmation. For this reason certain difference quantities inthe subsequent documents (for example, invoices) remain unread.

Procedure
We recommend that you cancel previous invoices before confirmingdelivery receipt confirmations when difference quantities occur.
Then confirm the recpeipt confirmation and create a new invoice usingthe confirmed amounts