APP-SQLAP-97150 You cannot cancel this invoice because the cancellation would reduce the quantity or

I have a doubt respect this note:

APP-SQLAP-97150 You cannot cancel this invoice because the cancellation would
reduce the quantity or amount billed on one or more purchase orders to be
less than zero .We suggest you run the Matching Detail report for this
invoice and the purchase orders to which it is matched in order to review the
matching history . This report can assist you in identifying negative-amount distributions that are matched to the same purchase order(s) as this invoice.

I have an standard invoice and some debit memos which are matching at the same PO and Release; I cancelled the standard invoice, the system allowed; but when I tried to cancel the debit memos, system does not allowed and shows me the mentioned note; how can I cancel them?