Group Reporting: Upgrade from release S/4HANA 1909 to a higher release

[SAPSupport]

A system including one or more Group Reporting client(s) is to be upgraded from S/4HANA 1909 to a higher release (e.g. S/4HANA 2020, 2021, 2022, etc.).
What is the most important point to consider before the upgrade?

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[SAPSupport · Accepted solution]

Required actions before performing the upgrade:
1) Read attachment How to Upgrade Group Reporting - 1909 to 2020 (2).pdf of FAQ SAP Note 2659672 and SAP Note 2941945.
2) Import code correction of SAP Note 2941945.
3) Read SAP Note 2941945 and proceed accordingly, i.e. run report FINCS_CHECK_LEDGER to check whether version / ledger settings are compliant with higher release.

If SAP Note 2941945 was forgotten and upgrade done and version ledger consistency was not given before the upgrade, i.e. an error pop-up comes in Data Monitor app:
4) Send customer case to SAP Support on component FIN-CS-COR.
5) Do NOT run Initialize Settings configuration step!