The summarization version could not be deleted.

What causes this issue?

You tried to delete a summarization version. The system determined that
there is still data in the summarization database for this
summarization version.

System Response

The summarization version is not deleted.

How to fix this error?

If you really want to delete this summarization version, you must first
delete all data (transaction data and hierarchy information) belonging
to this summarization version from the summarization database.

Error message extract from SAP system. Copyright SAP SE.