Hierarchy table &1 could not be deleted

What causes this issue?

You have changed or enhanced the arrangement of planning levels. As a
result, hierarchy table &V1& for saving proportional factors using
planning hierarchies has to be generated again by the system.
Proportional factors have already been created in this table and they
must be deleted so that the scenario can be deleted.
Deletion could not be executed successfully!

System Response

The planning scenario could not be activated.

How to fix this error?

Delete hierarchy table &V1& using the SAP Data Dictionary.

Procedure for System Administrators

The hierarchy table for Merchandise & Assortment Controlling are
generated DDIC tables that can be processed (with restrictions) using
the Data Dictionary. If it is not possible to activate a planning
scenario, it is possible to delete the entries that already exist in
hierarchy table &V1& or the entire table via the Data Dictionary.

Error message extract from SAP system. Copyright SAP SE.