Invoice document cannot be cancelled

What causes this issue?

You wish to cancel invoice document &V1&/&V2&. This is not possible,
for one of the following reasons:
When the document was entered, the invoice difference amount was
accepted either manually by the user or automatically by the system.
When the document was entered, the invoiced was reduced.
The document contains returns items.
The document was posted with a transfer price

System Response

The system refuses to cancel the invoice document.

How to fix this error?

If document &V1&/&V2& is an invoice, enter a credit memo with the same
amounts, allocation etc. as in the invoice. If the invoice was reduced,
enter a credit memo for the amount of the invoice reduction, or for the
whole amount invoiced.
Note that you must use a net document type if the invoice was posted
with a net document type.
If document &V1&/&V2& is a credit memo, enter an invoice for the full
amount.
Note that you must use a net document type if the credit memo was
posted with a net document type.
If the document was entered using a transfer price, you can revers the
posting only using transfer price handling.

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