How To Fix SAPLWOSZ031 - EAN &1 is not unique

SAP Error Message - Details

• Message type: E = Error

• Message class: SAPLWOSZ - Common function modules for Store WB

• Message number: 031

• Message text: EAN &1 is not unique

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 SAPLWOSZ031 - EAN &1 is not unique ?

  The SAP error message "SAPLWOSZ031 EAN &1 is not unique" typically occurs in the context of handling materials or products that have an EAN (European Article Number) or barcode associated with them. This error indicates that the EAN you are trying to use is not unique in the system, meaning that there are multiple entries with the same EAN.
  Cause:
  
  Duplicate EANs: The most common cause of this error is that the EAN you are trying to enter already exists in the system for another material or product.
  Data Entry Errors: There may have been a mistake in data entry, leading to the same EAN being assigned to multiple materials.
  Master Data Issues: The material master data may not have been maintained correctly, leading to duplicates.
  
  Solution:
  
  
  Check for Duplicates:
  
  Use transaction codes like MM03 (Display Material) or MM02 (Change Material) to search for the EAN in the material master.
  You can also use transaction SE16N to query the relevant database tables (e.g., MARA, MARC, or MAST) to find all entries with the same EAN.
  
  
  
  Correct the Data:
  
  If you find that the EAN is indeed duplicated, you will need to determine which entry is correct and either delete or change the other entries to ensure that each EAN is unique.
  If the EAN is incorrectly assigned, update the material master data to reflect the correct EAN.
  
  
  
  Consult with Your Team:
  
  If you are unsure about which entry to keep or how to proceed, consult with your team or a data steward responsible for material master data management.
  
  
  
  Implement Data Governance:
  
  To prevent this issue from occurring in the future, consider implementing stricter data governance practices around the assignment of EANs and other unique identifiers.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM01 (Create Material), MM02 (Change Material), and MM03 (Display Material).
  Material Master Data: Understanding how material master data is structured in SAP can help in troubleshooting and resolving issues related to EANs.
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error message, as there may be known issues or fixes provided by SAP.
  
  By following these steps, you should be able to resolve the "EAN &1 is not unique" error and ensure that your material data is correctly maintained.