What causes this issue?

Dependent data still exists in &V1& &V2&.

System Response

In the time period selected for data destruction, dependent data records
still exist for the personnel number in &V1& &V2&. The data of &V1& &V3&
can be destroyed only when dependent data no longer exists in &V1& &V2&
for this personnel number. This behavior is in place to prevent data
inconsistencies.

How to fix this error?

The data in &V1& &V3& is not destroyed.

Procedure for System Administrators

Execute a data destruction session to delete the dependent data records
of &V1& &V2&. Then execute another data destruction session to delete
the data records of &V1& &V3&.
In other words, if all of the data records of &V1& &V2& for this
personnel number are deleted in the current data destruction session, it
is sufficient to execute a new data destruction session after the first
one has ended successfully. As a result, the data of &V1& &V3& is also
destroyed.

Error message extract from SAP system. Copyright SAP SE.