No internal SAP country key found for country &1 in ISO code.

What causes this issue?

The system could not find an internal SAP country key in a data record.
It also could not derive the country code from ISO code &V1&.

System Response

The summarization data is not updated.

How to fix this error?

Check the ISO code used. If necessary, assign the ISO code to an
internal SAP country code in Customizing.

Error message extract from SAP system. Copyright SAP SE.