How To Fix ESH_OM_OBJ_MODEL_REP688 - GUID for optimized model is already used as a model GUID

SAP Error Message - Details

• Message type: E = Error

• Message class: ESH_OM_OBJ_MODEL_REP - Object Model Repository

• Message number: 688

• Message text: GUID for optimized model is already used as a model GUID

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 ESH_OM_OBJ_MODEL_REP688 - GUID for optimized model is already used as a model GUID ?

  The SAP error message ESH_OM_OBJ_MODEL_REP688 indicates that there is an issue with the GUID (Globally Unique Identifier) for an optimized model in the SAP Enterprise Search (SAP ESH) system. Specifically, the error states that the GUID for the optimized model is already being used as a model GUID, which means that there is a conflict in the identification of the models.
  Cause:
  
  Duplicate GUIDs: The most common cause of this error is that there are multiple models in the system that are trying to use the same GUID. This can happen due to incorrect configuration, data migration issues, or manual errors during model creation.
  Model Configuration Issues: If the model was not properly configured or if there were changes made to the model that were not correctly saved or updated, it could lead to this error.
  System Migration or Upgrade: If the system has recently undergone a migration or upgrade, there may be inconsistencies in the model definitions that lead to GUID conflicts.
  
  Solution:
  
  Check Existing Models: Review the existing models in the system to identify if there are any duplicates. You can do this by accessing the relevant transaction codes or using the SAP GUI to navigate to the model management area.
  Delete or Rename Conflicting Models: If you find that there are indeed duplicate models, you may need to delete or rename one of them to resolve the conflict. Ensure that you back up any necessary configurations before making changes.
  Recreate the Model: If the model is corrupted or improperly configured, consider deleting it and recreating it with a new GUID.
  Check Transport Requests: If the issue arose after a transport, check the transport requests to ensure that they did not inadvertently overwrite or duplicate model configurations.
  Consult SAP Notes: Look for any relevant SAP Notes that may address this specific error. SAP frequently updates its knowledge base with solutions for known issues.
  System Consistency Check: Run consistency checks in the system to ensure that all models and their configurations are correctly set up.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like Esh_Mdl, Esh_Mdl_Rep, or Esh_Mdl_Adm for managing models in SAP ESH.
  SAP Documentation: Refer to the official SAP documentation for Enterprise Search for detailed guidance on model management and troubleshooting.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  
  If the problem persists after trying the above solutions, it may be beneficial to reach out to SAP support for further assistance.