abh1sar opened a new issue, #12590:
URL: https://github.com/apache/cloudstack/issues/12590

   ### problem
   
   It was observed that in the usage_events table, two VM.START events for the 
same VM had the same timestamp
   
   | id       | type                     | account_id | created              | 
count | resource_id | name         |
   
|----------|--------------------------|------------|----------------------|-------|-------------|--------------|
   | 1067272  | VM.START                 | 653        | 2025-10-27 13:02:07  | 
2     | 66880       | fedora  |
   | 1067284  | VM.STOP                  | 653        | 2025-10-27 13:02:06  | 
2     | 66880       | fedora  |
   | 1067293  | VM.START                 | 653        | 2025-10-27 13:02:07  | 
2     | 66880       | fedora  |
   
   This leads to exception in createVMHelperEvent and this event is never 
marked as processed.
   
   ```
   java.sql.SQLIntegrityConstraintViolationException: Duplicate entry 
'66880-1-2025-10-27 13:02:07' for key 'usage_vm_instance.vm_instance_id'
   "2025-12-22 00:06:57,536 ERROR 
[cloud.usage.UsageManagerImpl_EnhancerByCloudStack_ba4e5a30] (Usage-Job-1:[]) 
(logid:) Error saving usage instance for vm: 66880 
javax.persistence.EntityExistsException: Entity already exists"
   
   ```
   
   This causes the usage server to always start processing from this point.
   
   ### versions
   
   _No response_
   
   ### The steps to reproduce the bug
   
   1.
   2.
   3.
   ...
   
   
   ### What to do about it?
   
   _No response_


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