I have daily Network Discoveries running for my subnets. Nodes get decomissioned all the time and i'm told to delete them from Orion monitoring but they show up again in my daily scans (network discoveries) if the node isn't removed from the subnet. It's a little tedious trying to keep track of which nodes to import and which to ignore sometimes. It would be easier if upon deleting a node you had the option of adding it to the Discovery Ignore List.