How To Fix MO430 - A data record with the specified key already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: MO - Modeling and Prototyping

• Message number: 430

• Message text: A data record with the specified 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.

Smart SAP Assistant

• What is the cause and solution for SAP error message MO430 - A data record with the specified key already exists ?

  The SAP error message MO430, which states "A data record with the specified key already exists," typically occurs in the context of Material Management (MM) or Production Planning (PP) modules when you are trying to create or update a record (such as a material master, production order, or other transactional data) that already exists in the system with the same key.
  Cause:
  
  Duplicate Entry: The most common cause of this error is that you are attempting to create a new record (e.g., a material, production order, etc.) with a key (like a material number or order number) that already exists in the database.
  Incorrect Data Entry: Sometimes, the data being entered may not be validated properly, leading to attempts to create duplicates.
  Data Migration Issues: If data is being migrated from another system or through a batch input session, it may lead to duplicate entries if not handled correctly.
  Concurrency Issues: If multiple users are trying to create the same record simultaneously, it can lead to this error.
  
  Solution:
  
  Check Existing Records: Before creating a new record, check if a record with the same key already exists. You can do this by using transaction codes like MM03 (for material master) or CO03 (for production orders) to view existing records.
  Use Different Key: If you are sure that you need to create a new record, ensure that you are using a unique key that does not conflict with existing records.
  Data Validation: Implement validation checks in your data entry process to prevent duplicate entries. This can be done through user exits or BAdIs (Business Add-Ins).
  Error Handling in Data Migration: If this error arises during data migration, ensure that your migration scripts or tools are designed to check for existing records before attempting to create new ones.
  Consult Documentation: Review SAP documentation or consult with your SAP support team for specific guidance related to the module you are working with.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes for checking existing records (e.g., MM03, CO03, MB52, etc.).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Authorization: Ensure that you have the necessary authorizations to create or modify the records in question.
  System Logs: Review system logs (transaction SLG1) for additional details that may help diagnose the issue.
  
  By following these steps, you should be able to resolve the MO430 error and prevent it from occurring in the future.