Entry in BSIS_BCK without BKPF and no archiving flag: &1 message(s)

What causes this issue?

There are line items in the index table BSIS_BCK without header
information in table BKPF which are not marked as partially archived
(field xarch) in the index table BSIS_BCK.

System Response

The system informs about this inconsistency which has to be corrected in
your productive system before starting the data migration.

How to fix this error?

This inconsistency can be corrected by program 'FIN_CORR_MIG_ERROR_SFIN'
in the original source system (i. e. your productive system):
If you want to correct inconsistencies concerning missing archiving
information found in migration to S/4HANA Finance, then you have to
start program FIN_CORR_MIG_ERROR_SFIN in the original source system. The
inconsistencies which have to be corrected are determined by a RFC-call
from the original source system to this system. For more information,
read the program documentation of program FIN_CORR_MIG_ERROR_SFIN in the
original source system.
This procedure of correction in the original source system will ensure
that these inconsistencies will not occur in future test migrations any
more.

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.