How To Fix /SCWM/LK021 - Consistency problem: blocking entry already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCWM/LK -

• Message number: 021

• Message text: Consistency problem: blocking entry already exists

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SCWM/LK021 - Consistency problem: blocking entry already exists ?

  The SAP error message /SCWM/LK021 Consistency problem: blocking entry already exists typically occurs in the SAP Extended Warehouse Management (EWM) module. This error indicates that there is a conflict with blocking entries in the system, which can prevent certain operations from being completed.
  Cause:
  The error is usually caused by one of the following reasons:
  
  Existing Blocking Entry: There is already a blocking entry in the system for the same object (e.g., a warehouse task, stock, or handling unit) that you are trying to process.
  Data Consistency Issues: There may be inconsistencies in the data due to incomplete transactions or system errors.
  Concurrent Processing: Multiple users or processes may be trying to access or modify the same data simultaneously, leading to conflicts.
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check Existing Blocking Entries:
  
  Use transaction codes like /SCWM/BLK or relevant reports to check for existing blocking entries in the system.
  Identify the blocking entry that is causing the conflict.
  
  
  
  Remove or Adjust Blocking Entries:
  
  If the blocking entry is no longer needed, you can remove it. This may involve using specific transactions or reports to delete or adjust the blocking entry.
  Ensure that any necessary data is saved or processed before removing the blocking entry.
  
  
  
  Review Transaction Logs:
  
  Check the transaction logs to identify any incomplete processes that may have led to the creation of the blocking entry.
  Resolve any issues found in the logs.
  
  
  
  Consult with Technical Support:
  
  If you are unable to resolve the issue, consider reaching out to your SAP support team or consulting with SAP technical support for further assistance.
  
  
  
  System Restart:
  
  In some cases, a system restart may help clear temporary locks or inconsistencies.
  
  
  
  Related Information:
  
  Documentation: Refer to SAP EWM documentation for more details on handling blocking entries and data consistency issues.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed.
  
  By following these steps, you should be able to identify and resolve the cause of the /SCWM/LK021 error in your SAP EWM system.