Customer transaction figures (Bal.Carried Fwd) for &1 inconsistent

What causes this issue?

Customer transaction figures for &V1& are inconsistent concerning
balance carry forward.
The system compared the balance carry forward stored in the
backup-tableKNC1_BCK with the balance carry forward calculated by the
view KNC1 and found that they differ.
It is required to run the balance carry forward report SAPF010 before
the installation of the SAP S/4HANA Finance. Most likely this was not
done for this customer account and fiscal year.
As a result, the balance carry forward in the backup-table is wrong, and
this wrong figure is used as calculation basis for the subsequent years.

System Response

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

How to fix this error?

If you came across this issue in a test system, make sure the same does
not happen with the upgrade of your production system. Run program
SAPF010 for all companies up to the current fiscal year to ensure that
the balance carry forwards in the backup-tables are correct. This must
be done <ZH>before</> the upgrade, running SAPF010 afterwards does not
fix the issue.
If you find this issue in your production system, check that the balance
carry forwards for this account are displayed correctly. Open
transaction
<DS:TRAN.FD10N>FD10N</> year by year and check that the closing balance
matches the balance carry forward of the next year. If all balances are
correct you can ignore this error message. If they are not correct,
contact the SAP Support in order to have the inconsistencies repaired.

Procedure for System Administrators

The balance carry forward is a basic step which has to be executed
before the installation of SAP S/4HANA Finance.

Error message extract from SAP system. Copyright SAP SE.