When attempting to delete symptom definitions related to stale supermetric entries we will see error .
The deletion attempts fail with an error message stating that the definitions are currently in use, preventing cleanup or reconfiguration efforts.
VMware Aria Operations 8.16 and Later
Action Plan:
Identify all alert definitions that reference the supermetric symptom definitions.
Edit each of these alert definitions and remove the associated symptom entries.
Once the symptoms are removed from all referencing alert definitions, proceed to delete the symptom definitions.
After completing the above steps, the previously undeletable symptom definitions will be successfully removed.
Broadcom TechDocs – Defining Symptoms for Alerts