How To Fix KM420 - Changed entry in Table & with key &

SAP Error Message - Details

• Message type: E = Error

• Message class: KM - Error messages for Profit Center Accounting

• Message number: 420

• Message text: Changed entry in Table & with key &

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 KM420 - Changed entry in Table & with key & ?

  The SAP error message KM420 ("Changed entry in Table & with key &") typically indicates that there has been a modification to a database table entry that is being accessed or processed in a transaction. This error often arises in scenarios where data consistency is critical, such as during updates or when multiple users are trying to access the same data simultaneously.
  Cause:
  
  Concurrent Updates: The most common cause of this error is that another user or process has changed the data in the table after it was read by the current transaction. This can happen in environments where multiple users are working on the same data.
  Data Locking: If a record is locked by another transaction and then modified, it can lead to this error when the current transaction tries to commit changes based on the old data.
  Inconsistent Data State: The application logic may not be handling the data state correctly, leading to attempts to update or read stale data.
  
  Solution:
  
  Refresh Data: If you encounter this error, try refreshing the data in your session. This can often resolve the issue if the data has changed since it was last read.
  Retry the Transaction: After refreshing, attempt to re-execute the transaction. If the data has been updated by another user, your transaction may succeed if it now reflects the latest state.
  Check for Locks: Use transaction codes like SM12 (to check for locks) and SM21 (to check system logs) to identify if there are any locks or issues that might be causing the error.
  Implement Error Handling: If you are developing custom programs, ensure that you have proper error handling in place to manage this type of error gracefully. This may include retry logic or user notifications.
  Consult with Basis Team: If the issue persists, it may be beneficial to consult with your SAP Basis team to investigate any underlying database issues or to check for system performance problems.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SE11 (Data Dictionary), SE16 (Data Browser), and SM37 (Job Monitoring) to analyze the data and job statuses.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  Documentation: Review SAP documentation for the specific module you are working with, as there may be additional context or specific configurations that could affect data handling.
  
  If the problem continues to occur frequently, it may be worth investigating the overall design of the application or process to ensure that it can handle concurrent data access more effectively.