How To Fix CNV_DCII_COMM009 - Old value &1 exists more than once in the mapping

CNV_DCII_COMM009 - Overview

• Message type: E = Error

• Message class: CNV_DCII_COMM - messages of objects of dev class CNV_DCII_COMM

• Message number: 009

• Message text: Old value &1 exists more than once in the mapping

Self-Explanatory Message

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CNV_DCII_COMM009 - Details

• The SAP error message CNV_DCII_COMM009 indicates that there is a duplicate entry for an old value in the mapping table during a data conversion or migration process. This typically occurs in the context of SAP's Data Conversion or Migration tools, such as the SAP S/4HANA Migration Cockpit or other data transformation tools.
  
  Cause:
  The error arises when the system detects that the old value (in the mapping) is not unique. This means that the same old value is mapped to multiple new values, which creates ambiguity in the data transformation process. This can happen due to:
  
  Data Duplication: The source data may have duplicate entries for the same old value.
  Incorrect Mapping Configuration: The mapping table may have been incorrectly configured, leading to multiple mappings for the same old value.
  Data Quality Issues: Poor data quality in the source system can lead to duplicates that were not anticipated.
  
  
  Solution:
  To resolve the CNV_DCII_COMM009 error, you can follow