How To Fix W_CB151 - Entitled supplier &1 is already contained in the list

SAP Error Message - Details

• Message type: E = Error

• Message class: W_CB -

• Message number: 151

• Message text: Entitled supplier &1 is already contained in the list

Self-Explanatory Message

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• What is the cause and solution for SAP error message W_CB151 - Entitled supplier &1 is already contained in the list ?

  SAP Error Message:
  
  W_CB151 Entitled supplier &1 is already contained in the list
  
  Cause:
  This warning message occurs when you try to add a supplier to a list (such as a source list, info record, or a similar master data object) but the supplier is already present in that list. The system prevents duplicate entries of the same supplier for the same material or purchasing info record.
  
  Explanation:
  
  The message indicates that the supplier you are attempting to add is already assigned or entitled in the relevant list.
  This typically happens during procurement master data maintenance, for example:
  
  When maintaining source lists.
  When creating or changing purchasing info records.
  When assigning suppliers to a material or purchasing group.
  
  
  
  
  Solution:
  
  
  Check Existing Entries:
  
  Review the current list or info record to confirm that the supplier is already included.
  Use transaction codes like:
  
  ME01 (Maintain Source List)
  ME11 / ME12 (Create/Change Purchasing Info Record)
  
  
  Look for the supplier in the list for the material or purchasing info record.
  
  
  
  Avoid Duplicate Entry:
  
  Since the supplier is already in the list, you do not need to add it again.
  If you intended to update or change the supplier’s details, modify the existing entry instead of creating a new one.
  
  
  
  If You Need to Add a Different Supplier:
  
  Ensure you are entering a different supplier number.
  Verify the supplier number you are entering is correct.
  
  
  
  If the Duplicate Entry is Required (Rare Case):
  
  Normally, SAP does not allow duplicate suppliers in the same list.
  If business requirements demand multiple entries for the same supplier (e.g., different validity periods), ensure the validity dates or other differentiating fields are correctly maintained.
  
  
  
  
  Additional Information:
  
  Message Class: W_CB151 is a warning message, so it does not stop the process but alerts you to a potential duplicate.
  Impact: Prevents data redundancy and maintains data integrity in procurement master data.
  Related Transactions:
  
  ME01 - Maintain Source List
  ME11 / ME12 - Create/Change Purchasing Info Record
  ME03 - Display Source List
  
  
  
  
  Summary:
  
  Cause: Supplier already exists in the list.
  Solution: Do not add the supplier again; modify the existing entry if needed.
  Check: Existing entries before adding new ones to avoid duplicates.
  
  
  If you need further assistance, please provide the transaction or process where this message appears, and I can help with more specific guidance.