How To Fix WE501 - Another EAN has already been entered for material and unit of measure

WE501 - Overview

• Message type: E = Error

• Message class: WE - Messages for EAN Customizing and for EAN management in MM_BD

• Message number: 501

• Message text: Another EAN has already been entered for material and unit of measure

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message WE501 - Another EAN has already been entered for material and unit of measure ?

  Certainly! Here's a detailed explanation of the SAP error message WE501: "Another EAN has already been entered for material and unit of measure":
  
  Error Message:
  WE501 - Another EAN has already been entered for material and unit of measure
  
  
  Cause:
  This error occurs when you try to assign an EAN (European Article Number, also known as GTIN - Global Trade Item Number) to a material and unit of measure combination in the system, but there is already a different EAN assigned to the same material and unit of measure.
  In SAP, each material and unit of measure combination can only have one unique EAN assigned. If you attempt to enter a new EAN for the same material and unit of measure where an EAN already exists, the system throws this error to prevent duplicate or conflicting EAN assignments.
  
  Where does this happen?
  
  Typically during material master data maintenance (transaction MM02 or MM01).
  When maintaining EAN/UPC codes in the