No internal currency key was found for currency &1 in ISO code.

What causes this issue?

The system could not find an internal SAP currency key in a data
record. It also could not derive the currency key 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 currency code in Customizing.

Error message extract from SAP system. Copyright SAP SE.