How To Fix /SAPSLL/CORE_CLSMD123 - Control Class &1 already existing

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPSLL/CORE_CLSMD -

• Message number: 123

• Message text: Control Class &1 already existing

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPSLL/CORE_CLSMD123 - Control Class &1 already existing ?

  The SAP error message /SAPSLL/CORE_CLSMD123 Control Class &1 already existing typically occurs in the context of SAP Global Trade Services (GTS) or SAP Logistics, particularly when dealing with control classes in the system. This error indicates that there is an attempt to create or define a control class that already exists in the system.
  
  Cause:
  
  Duplicate Entry: The most common cause of this error is that a control class with the same identifier (denoted by &1 in the error message) already exists in the system.
  Data Migration or Upload: If you are migrating data or uploading control classes from an external source, it may lead to attempts to create duplicates.
  Configuration Errors: Incorrect configuration settings or processes that do not check for existing entries before creating new ones can also lead to this error.
  
  
  Solution:
  
  
  Check Existing Control Classes: 
  
  Use transaction codes like SE11 (Data Dictionary) or SE16 (Data Browser) to check the existing control classes