How To Fix LAW2_MESSAGES156 - System &1 with system number &2 and installation number &3 already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: LAW2_MESSAGES - LAW 2.0 Message Class

• Message number: 156

• Message text: System &1 with system number &2 and installation number &3 already exists

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 LAW2_MESSAGES156 - System &1 with system number &2 and installation number &3 already exists ?

  The SAP error message LAW2_MESSAGES156 indicates that there is a conflict with the system registration in the SAP Landscape Management (LaMa) or SAP Solution Manager. Specifically, it means that a system with the specified system ID, system number, and installation number already exists in the system landscape.
  Cause:
  
  Duplicate Registration: The system you are trying to register has already been registered in the SAP Landscape Management or Solution Manager.
  Incorrect Configuration: There may be a misconfiguration in the system landscape settings, leading to the system being recognized multiple times.
  Database Issues: There could be issues with the database that stores the system landscape information, causing it to incorrectly identify existing systems.
  
  Solution:
  
  
  Check Existing Systems: 
  
  Go to the SAP Landscape Management or Solution Manager and check the list of registered systems. Look for the system ID, system number, and installation number mentioned in the error message.
  
  
  
  Remove Duplicate Entry:
  
  If you find a duplicate entry, you can either remove it or update it as necessary. Ensure that you have the correct permissions to make changes in the system landscape.
  
  
  
  Correct Configuration:
  
  If the system is not supposed to be registered, ensure that the configuration settings are correct. This may involve checking the configuration files or settings in the SAP system.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation for Landscape Management or Solution Manager for specific instructions on managing system registrations.
  
  
  
  Contact SAP Support:
  
  If you are unable to resolve the issue, consider reaching out to SAP Support for assistance. Provide them with the error message details and any steps you have already taken.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  System Landscape Management (LaMa): Familiarize yourself with the functionalities of SAP LaMa, as it provides tools for managing system landscapes effectively.
  SAP Solution Manager: If you are using Solution Manager, ensure that you are familiar with its capabilities for monitoring and managing SAP systems.
  
  By following these steps, you should be able to resolve the error and ensure that your SAP system landscape is correctly configured.