How To Fix SAML2028 - The assertion has already been consumed

SAML2028 - Overview

• Message type: E = Error

• Message class: SAML2 - SAML2 Nachrichten

• Message number: 028

• Message text: The assertion has already been consumed

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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Smart SAP Assistant

• What is the cause and solution for SAP error message SAML2028 - The assertion has already been consumed ?

  The SAP error message SAML2028: The assertion has already been consumed typically occurs in the context of Single Sign-On (SSO) implementations using SAML (Security Assertion Markup Language). This error indicates that the SAML assertion (a piece of data that contains authentication information) has already been used for authentication and cannot be reused.
  
  Cause:
  
  Assertion Reuse: SAML assertions are designed to be used only once for security reasons. If an assertion is sent to the service provider (SP) and is then used again, the SP will reject it, leading to the SAML2028 error.
  Session Management Issues: If the application or service is not properly managing sessions, it may attempt to use the same assertion multiple times.
  Clock Skew: If there is a significant time difference between the Identity Provider (IdP) and the Service Provider (SP), it may lead to issues with assertion validity.
  Network Issues: If there are network delays or issues that cause the assertion