Area not defined as derived area

What causes this issue?

You want to write-back a derived area. The area displayed, however, has
not been defined as a derived area, therefore you cannot perform this
function.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Choose another function.

Error message extract from SAP system. Copyright SAP SE.