Message type: E = Error
Message class:  CNV_20375_CHECK - Message Class for 20375 Checks 
Message number: 008
Message text: Cost Element &1: Field &2 needs to be unique in fiscal year &3.
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The SAP error message CNV_20375_CHECK008 typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that there is a problem with the uniqueness of cost elements in a specific fiscal year.
Cause: The error message "Cost Element &1: Field &2 needs to be unique in fiscal year &3" suggests that there are duplicate entries for a specific cost element in the specified fiscal year. This could happen due to: Duplicate Data: There are multiple records for the same cost element in the same fiscal year, which violates the uniqueness constraint. Data Migration Issues: During the migration process, data from legacy systems may have been incorrectly mapped or duplicated. Configuration Errors: Incorrect configuration settings in the SAP system may lead to the creation of duplicate entries.
Solution: To resolve this error, you can take the following steps: Identify Duplicates: Use transaction codes like SE16 or SE11 to query
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