How To Fix RE189 - Simultaneous entry of a vendor and a customer is not possible

RE189 - Overview

• Message type: E = Error

• Message class: RE - Earmarked funds

• Message number: 189

• Message text: Simultaneous entry of a vendor and a customer is not possible

What causes this issue?

Both a vendor and a customer is specified in the earmarked fund. This
is not allowed.

System Response

Further processing is not possible.

How to fix this error?

Enter a vendor or a customer.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RE189 - Simultaneous entry of a vendor and a customer is not possible ?

  The SAP error message RE189, which states "Simultaneous entry of a vendor and a customer is not possible," typically occurs when you attempt to create or modify a business partner in SAP that is set up as both a vendor and a customer at the same time. This situation is not allowed in SAP because it can lead to confusion in financial transactions and reporting.
  
  Cause:
  
  Business Partner Configuration: The business partner you are trying to create or modify is already defined as both a vendor and a customer in the system.
  Data Entry Error: You may have inadvertently entered data that suggests the same entity is both a vendor and a customer.
  Master Data Management: The system is designed to prevent the simultaneous creation of a vendor and a customer to maintain data integrity.
  
  
  Solution:
  
  
  Check Existing Business Partner: 
  
  Go to the Business Partner transaction (BP) and check if the business partner you are trying