Message type: E = Error
Message class:  CNV_20100 - Messageclass for chart of account conversion 
Message number: 395
Message text: After conversion, account/cost element is no longer in account group &1
After the conversion, the G/L account or cost element &V3& will no
longer lie in the account group.
Old/New account group: &V1&
Old/New Interval: &V2&
Old G/L account or cost element: &V3&
New G/L account or cost element: &V4&
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Warning
If necessary, change the mapping for interval limits for the relevant
account group accordingly.
Alternatively you should manually check your account groups for
consistency after the conversion.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_20100395 indicates that after a data conversion process, a specific account or cost element is no longer associated with the expected account group. This typically occurs during data migration or conversion activities, such as when using the SAP S/4HANA Migration Cockpit or other data migration tools.
Cause: Data Mapping Issues: The account or cost element may not have been correctly mapped to an account group during the conversion process. Configuration Changes: Changes in the configuration of account groups or the creation of new account groups that do not include the account or cost element. Missing Master Data: The required master data for the account or cost element may not exist in the target system. Inconsistent Data: The data in the source system may not comply with the rules or structure of the target system.
Solution: Check Account Group Configuration: Verify the configuration of the account groups in the target system. Ensure that the
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CNV_20100394 After conversion, cost element &3 is new in cost element group &1
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CNV_20100393 After conversion, cost element &3 is no longer in cost element group &1
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CNV_20100396 After conversion, account / cost element is new in account group &1
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