By default, the subnet creation wizard will auto-populate the Supernet fields based on the selected supernet in the tree, or specify an arbitrary, uncreated supernet. However, it might be beneficial to change this to a dropdown only showing existing supernets in IPAM, for ease of user selection. We are tracking multiple supernets in multiple sites, and for the end user, it might be hard to remember to pre-select in the initial tree, and an option to correct which supernet you wish to generate from would be desirable.