DXNetOps 22.2.x has the ability to dynamically retire devices deleted from Spectrum in Performance Management to ensure accurate and consistent devices monitoring across both products.
In NetOps Performance Management, when configuring the Spectrum Data Source, select "Synchronize device life cycle state from Spectrum" option:
With that, when a device is deleted from Spectrum, it will be retired in Performance Management depending on user input.
In NetOps Spectrum when deleting a device model, users can decide whether to delete the device in Spectrum only or to retire the device in Performance Management.
Refer to the NetOps Spectrum documentation for more details: