How To Fix TRUST160 - Certificate already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: TRUST - Certificate Management

• Message number: 160

• Message text: Certificate 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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message TRUST160 - Certificate already exists ?

  The SAP error message TRUST160: Certificate already exists typically occurs when you are trying to import a digital certificate into the SAP system, but a certificate with the same identifier (such as the same subject name or key) already exists in the system's trust store.
  Cause:
  
  Duplicate Certificate: The most common cause is that the certificate you are trying to import is already present in the system's certificate store.
  Incorrect Import Process: Sometimes, the import process may not have been completed correctly, leading to inconsistencies in the trust store.
  Different Formats: If you are trying to import a certificate in a different format or with different parameters that match an existing certificate, it may trigger this error.
  
  Solution:
  To resolve the TRUST160 error, you can follow these steps:
  
  
  Check Existing Certificates:
  
  Use transaction code STRUST to access the Trust Manager.
  Navigate to the appropriate certificate store (e.g., "SSL Client (Standard)" or "SSL Server (Standard)").
  Look for the certificate that is causing the conflict. You can check the details to confirm if it is indeed the same certificate.
  
  
  
  Delete or Replace the Existing Certificate:
  
  If you confirm that the existing certificate is no longer needed or is outdated, you can delete it from the trust store.
  If you need to replace it, you may need to delete the existing certificate first and then import the new one.
  
  
  
  Import the Certificate Again:
  
  After deleting the conflicting certificate, try importing the new certificate again using the same process you initially used.
  
  
  
  Check for Multiple Instances:
  
  Ensure that you are not trying to import the same certificate into multiple locations or stores within the Trust Manager.
  
  
  
  Use Different Alias:
  
  If applicable, consider using a different alias or identifier for the new certificate to avoid conflicts.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like STRUST, STRUSTSSO2, and STRUSTSSL for managing certificates and trust relationships.
  Documentation: Refer to SAP documentation on managing SSL certificates and trust relationships for detailed steps and best practices.
  Backup: Always back up your existing certificates and configurations before making changes to the trust store to prevent accidental loss of important certificates.
  
  If the issue persists after following these steps, consider consulting with your SAP Basis team or SAP support for further assistance.