How To Fix TN521 - Add-on &1 is already installed

TN521 - Overview

• Message type: E = Error

• Message class: TN - Support Package Manager (SPAM) Messages

• Message number: 521

• Message text: Add-on &1 is already installed

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.

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TN521 - Details

• The SAP error message TN521, which states "Add-on &1 is already installed," typically occurs when you attempt to install an add-on that is already present in the system. This can happen during the installation process of SAP add-ons or enhancements.
  
  Cause:
  
  Duplicate Installation Attempt: The add-on you are trying to install is already installed in the SAP system.
  Incorrect Version: You may be trying to install a different version of an add-on that is already installed.
  Incomplete Uninstallation: If an add-on was previously uninstalled but not completely removed, the system may still recognize it as installed.
  
  
  Solution:
  
  
  Check Installed Add-ons: 
  
  Use transaction code SFW5 or SFW2 to check the list of installed add-ons in your SAP system. Verify if the add-on you are trying to install is already listed.
  
  
  
  Uninstall the Existing Add-on:
  
  If you confirm that the add-on is installed and you want to install a different version or a new add-on, you may need to uninstall