How To Fix JIT00671 - An entry already exists for material number &1 and plant &2

SAP Error Message - Details

• Message type: E = Error

• Message class: JIT00 - JIT: Messages for JIT Process

• Message number: 671

• Message text: An entry already exists for material number &1 and plant &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message JIT00671 - An entry already exists for material number &1 and plant &2 ?

  The SAP error message JIT00671 indicates that there is an attempt to create or update a record for a material in a specific plant, but an entry for that combination already exists in the system. This typically occurs in the context of Just-In-Time (JIT) processing, where materials are managed closely between suppliers and production.
  Cause:
  
  Duplicate Entry: The most common cause is that there is already an existing record for the specified material number and plant combination in the JIT database.
  Data Entry Error: There may have been an error in data entry, leading to an attempt to create a duplicate record.
  Integration Issues: If data is being imported or integrated from another system, it may lead to duplicates if the checks for existing records are not properly implemented.
  
  Solution:
  
  
  Check Existing Records: 
  
  Use transaction codes like MM03 (Display Material) or JIT1 (JIT Data) to check if the material number and plant combination already exists.
  If it does exist, review the details to determine if the existing record is valid or if it needs to be updated instead of creating a new one.
  
  
  
  Update Instead of Create: 
  
  If the record already exists and needs modification, use the appropriate transaction (like JIT2 for changing JIT data) to update the existing entry rather than trying to create a new one.
  
  
  
  Data Validation: 
  
  Implement validation checks in your data entry processes or integration routines to prevent duplicate entries from being created in the first place.
  
  
  
  Consult Documentation: 
  
  Review SAP documentation or consult with your SAP support team for specific guidelines related to JIT processing and handling of material records.
  
  
  
  Error Handling: 
  
  If this error occurs during a batch process or integration, ensure that error handling is in place to log and manage such issues effectively.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM01 (Create Material), MM02 (Change Material), MM03 (Display Material), and JIT1/JIT2 for JIT-specific operations.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Roles and Authorizations: Ensure that the user has the necessary authorizations to create or modify records in the JIT area.
  
  By following these steps, you should be able to resolve the JIT00671 error and prevent it from occurring in the future.