How To Fix CR151 - System error: Entry in table & already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: CR - (1,099) Work Center; (100,200) Capacity

• Message number: 151

• Message text: System error: Entry in table & already exists

INCLUDE NA_SYSAD2

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CR151 - System error: Entry in table & already exists ?

  The SAP error message CR151, which states "System error: Entry in table & already exists," typically occurs when there is an attempt to create or insert a record in a database table where a record with the same key already exists. This can happen in various contexts, such as during the creation of master data, configuration settings, or transactional data.
  Causes:
  
  Duplicate Entries: The most common cause is that the system is trying to create a new entry that has the same key (primary key or unique constraint) as an existing entry in the specified table.
  Data Migration Issues: During data migration or upload processes, if the data being uploaded contains duplicates, this error can occur.
  Concurrency Issues: If multiple users or processes are trying to create the same entry simultaneously, it can lead to this error.
  Incorrect Configuration: Sometimes, incorrect configuration settings or custom developments can lead to attempts to create duplicate entries.
  
  Solutions:
  
  Check for Existing Entries: Before attempting to create a new entry, check the table to see if an entry with the same key already exists. You can use transaction codes like SE11 (Data Dictionary) or SE16 (Data Browser) to view the table contents.
  Modify the Data: If you find that the entry already exists, you may need to modify your data input to avoid duplicates. This could involve changing the key or updating the existing record instead of creating a new one.
  Data Cleansing: If this error arises during data migration, ensure that the data being migrated is cleansed and does not contain duplicates.
  Review Custom Code: If the error is occurring in a custom program or enhancement, review the code to ensure that it properly checks for existing entries before attempting to create new ones.
  Locking Mechanisms: Implement proper locking mechanisms to prevent concurrent processes from trying to create the same entry at the same time.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide additional guidance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SE11 (Data Dictionary), SE16 (Data Browser), and SE37 (Function Module) to investigate the issue further.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  Documentation: Review SAP documentation related to the specific module or functionality where the error occurs for additional context and troubleshooting steps.
  
  If the issue persists after trying the above solutions, it may be beneficial to involve your SAP Basis or development team for further investigation.