How To Fix CNV_MBT_46131 - A definition with the same key already exists

CNV_MBT_46131 - Overview

• Message type: E = Error

• Message class: CNV_MBT_46 - PCL message class

• Message number: 131

• Message text: A definition with the same key already exists

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_46131 - Details

• The SAP error message CNV_MBT_46131 indicates that there is an attempt to create or define an entry in the system that already exists, leading to a conflict. This error typically arises during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools.
  
  Cause:
  
  Duplicate Entries: The most common cause is that the system is trying to create a new entry (like a master data record) that has the same key (e.g., ID, code) as an existing entry in the database.
  Data Mapping Issues: There may be issues in the mapping of data from the source system to the target system, leading to attempts to create duplicate records.
  Configuration Errors: Incorrect configuration settings in the migration tool or the data model can lead to this error.
  
  
  Solution:
  
  
  Check for Duplicates: 
  
  Review the data being migrated to identify any duplicate entries. You can do this by querying the target database