How To Fix WH064 - EAN & is not unique

WH064 - Overview

• Message type: E = Error

• Message class: WH - Messages for store physical inventory (DRS)

• Message number: 064

• Message text: EAN & is not unique

What causes this issue?

In the system there are several material numbers stored for an
EAN.

System Response

The system cannot update this item.

How to fix this error?

Correct the material master data and start inbound processing for
this intermediate document again.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WH064 - EAN & is not unique ?

  Certainly! Here's a detailed explanation regarding the SAP error message WH064: EAN & is not unique:
  
  SAP Error Message: WH064 - EAN & is not unique
  Message Text:
  EAN & is not unique
  
  Cause
  
  The error occurs when you try to create or assign an EAN (European Article Number) or barcode to a material or packaging unit in the Warehouse Management (WM) or Logistics Execution (LE) module, and the system detects that the same EAN already exists for another material or packaging unit.
  EANs must be unique identifiers for materials or packaging units within the system to avoid confusion in scanning and inventory management.
  This error typically arises during:
  Material master data maintenance (e.g., in transaction MM02 or MM01)
  Packaging material assignment
  Warehouse management processes involving EANs
  
  
  The system checks the EAN master data table (e.g., MARA, MAKT, or specific EAN tables like MARM, EAN table) and finds a duplicate entry.
  
  
  Solution
  
  
  Check Existing EAN Assignments:
  
  Use transaction MM03 (Display Material) or MM04 (Display