How To Fix CNV_20700238 - Duplicate records after conversion in master table (MARA):

CNV_20700238 - Overview

• Message type: E = Error

• Message class: CNV_20700 - Material number conversion

• Message number: 238

• Message text: Duplicate records after conversion in master table (MARA):

Self-Explanatory Message

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CNV_20700238 - Details

• The SAP error message CNV_20700238 indicates that there are duplicate records in the master table MARA (Material Master) after a data conversion process. This typically occurs during data migration or conversion activities, such as when using SAP's Data Migration tools or during system upgrades.
  
  Cause:
  
  Duplicate Data in Source System: The source system may have contained duplicate entries for materials that were not identified or cleaned up before the migration.
  Incorrect Mapping: During the conversion process, the mapping of fields may have led to the creation of duplicate records.
  Data Transformation Issues: If there are issues in the transformation logic (e.g., during ETL processes), it can lead to duplicates being created.
  Configuration Errors: Incorrect configuration settings in the migration tool or process can also lead to duplicates.
  
  
  Solution:
  
  
  Identify Duplicates: 
  
  Use SQL queries or SAP transaction codes (like SE16N) to identify duplicate records in the MARA table. You can check for duplicates based on key fields such