Message type: E = Error
Message class:  CNV_CMIS_G - CMIS: general messages 
Message number: 026
Message text: - An upgrade test system is not necessary, no upgrade has to be executed
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The SAP error message CNV_CMIS_G026 indicates that an upgrade test system is not necessary because no upgrade is required to be executed. This message typically arises during the process of system conversion or upgrade, particularly in the context of SAP S/4HANA migrations or similar upgrade scenarios.
Cause: No Upgrade Required: The primary cause of this message is that the system you are working with is already at the required version or does not need an upgrade. This can happen if: The system is already on the target version. The upgrade process has already been completed successfully. The system is not eligible for an upgrade due to its current state or configuration.
Configuration Issues: There may be configuration settings or parameters that indicate the system is already up to date or does not require an upgrade.
Solution: Verify System Version: Check the current version of your SAP system to confirm whether it matches the target version you are trying
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