Message type: E = Error
Message class:  CNV_20200_CHECK - Messages for check functions (company code merge) 
Message number: 136
Message text: FI-SL ledger &1: diff. settings and not present in all particip. CoCodes
FI-SL ledger &V1& has different settings in the participating company
codes and does not exist in all participating company codes.
Error
A company code merge will lead to inconsistencies on special ledger
level. A company code merge can be done only when all participating
company codes have the same settings. We recommend that you  contact
your special ledger consultant in order to identify additional
activities.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_20200_CHECK136 typically arises during the data migration process, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that there are discrepancies in the settings of the Financial Statement Version (FI-SL ledger) across different company codes (CoCodes) involved in the migration.
Cause: The error message suggests that: Inconsistent Settings: The settings for the FI-SL ledger are not consistent across all participating company codes. This could mean that some company codes have different configurations or that the ledger is not activated for all company codes. Missing Configuration: The ledger might be configured in some company codes but not in others, leading to inconsistencies that prevent the migration process from proceeding smoothly.
Solution: To resolve this error, you can follow these steps: Check Ledger Configuration: Go to the SAP GUI and navigate to the configuration settings for the FI-SL ledger. Ensure that the ledger is configured consistently across all participating company codes. Activate Ledger
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