XXL function not possible - calculated key figure & was selected

What causes this issue?

The key figure "&V1&" cannot be downloaded to XXL as it is
calculated at runtime.

System Response

No download to XXL takes place.

How to fix this error?

Delete the key figure "&V1&" from the list using the function
"Choose key figures" and then recommence the download process to XXL.

Error message extract from SAP system. Copyright SAP SE.