Message type: E = Error
Message class:  CNV_20100 - Messageclass for chart of account conversion 
Message number: 154
Message text: Priority indicator is set more than once, which is not allowed
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The SAP error message CNV_20100154 indicates that there is an issue with the priority indicator being set more than once in a specific context, which is not allowed. This error typically arises during data migration or conversion processes, particularly when using SAP's data migration tools or during the execution of certain programs related to data conversion.
Cause: The error occurs when the same priority indicator is assigned to multiple entries in a dataset or configuration where unique priority indicators are expected. This can happen due to: Duplicate Entries: There may be duplicate entries in the data being processed, where the same priority indicator is assigned to more than one record.
Configuration Issues: Incorrect configuration settings in the migration tool or program that lead to multiple assignments of the same priority. Data Integrity Issues: The source data may have integrity issues, such as missing or incorrect identifiers that lead to the same priority being assigned multiple
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