After an application is no longer needed, a user puts in a ticket to delete...

When a VM managed by Self-Service (formerly Calm) is deleted manually from Prism Central, the associated application in Self-Service cannot be deleted using the standard delete action because the substrate is no longer present. In this scenario, the administrator should use the "Soft Delete" action in Self-Service, which will remove the application from management without requiring the substrate to be present.

References:

Nutanix documentation on Soft Delete.

Nutanix Best Practices for Managing Self-Service Applications.