How To Fix CNV_MBT_DEX230 - Duplicate key while updating control tables

CNV_MBT_DEX230 - Overview

• Message type: E = Error

• Message class: CNV_MBT_DEX - DMIS Data Extract related messages

• Message number: 230

• Message text: Duplicate key while updating control tables

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

CNV_MBT_DEX230 - Details

• The SAP error message CNV_MBT_DEX230: Duplicate key while updating control tables typically occurs during data migration or conversion processes, particularly when using SAP's Migration Cockpit or similar tools. This error indicates that there is an attempt to insert or update a record in a control table where a unique key constraint is violated due to the presence of duplicate entries.
  Causes:
  
  Duplicate Data: The most common cause is that the source data being migrated contains duplicate entries that violate the unique constraints of the target control tables.
  Incorrect Mapping: There may be issues with the mapping of fields from the source to the target, leading to unintended duplicates.
  Data Preparation Issues: If the data was not properly cleaned or transformed before migration, it could lead to duplicates.
  Concurrency Issues: If multiple processes are trying to update the same control table simultaneously, it could lead to conflicts.
  
  Solutions:
  
  
  Identify Duplicates: 
  
  Review the source data to identify any duplicate