Report group is being regenerated (change to report &)

What causes this issue?

Report &v1& has changed since the report group was last generated. The
current report definition and the generated Report Writer programs thus
no longer correspond with one another.

System Response

The report group is regenerated
Caution: during the generation, the existing data extracts for the
report group are deleted for technical reasons because the data
structure of the extracts is adjusted to the old generated programs.

How to fix this error?

Recreate the necessary data extracts - if possible, in background
processing.

Error message extract from SAP system. Copyright SAP SE.