How To Fix WN504 - Customer & already exists

WN504 - Overview

• Message type: E = Error

• Message class: WN - Plant master data maintenance (integrated)

• Message number: 504

• Message text: Customer & already exists

What causes this issue?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WN504 - Customer & already exists ?

  The SAP error message WN504 ("Customer & already exists") typically occurs when you are trying to create a new customer record in the system, but a customer with the same identifier (such as customer number or name) already exists in the database. This can happen in various modules, such as Sales and Distribution (SD) or Customer Relationship Management (CRM).
  
  Cause:
  
  Duplicate Entry: The most common cause is that the customer you are trying to create already exists in the system. This could be due to a previous entry that was not properly identified or a data import that included duplicates.
  Incorrect Data Entry: Sometimes, the data being entered may inadvertently match an existing customer due to typos or formatting issues.
  Different Organizational Units: The same customer might exist under different organizational units, leading to confusion when trying to create a new entry.
  
  
  Solution:
  
  Check Existing Customers: Before creating a new customer, search the customer database to