How To Fix UPWB139 - ABAP-OO class &1 already exists

UPWB139 - Overview

• Message type: E = Error

• Message class: UPWB - Messages for Development Class UPWB

• Message number: 139

• Message text: ABAP-OO class &1 already exists

What causes this issue?

No existing ABAP-00 classes were automatically overwritten when copying
Web interfaces for reasons of caution.

System Response

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

How to fix this error?

Delete the class manually in the transaction se80.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message UPWB139 - ABAP-OO class &1 already exists ?

  The SAP error message UPWB139 indicates that there is an attempt to create an ABAP Object-Oriented (OO) class that already exists in the system. This error typically occurs when you are trying to define a new class with the same name as an existing class.
  
  Cause:
  
  Duplicate Class Name: The most common cause of this error is that you are trying to create a class with a name that is already in use in the SAP system.
  Namespace Issues: If you are working in a specific namespace, ensure that the class name does not conflict with existing classes in that namespace or in the global namespace.
  Transport Requests: If you are working in a development environment and have transport requests that have not yet been imported into the target system, there may be a class with the same name in the target system.
  
  
  Solution:
  
  Check Existing Classes: Before creating a new class, check if a class