How do I remove old registered clients from the router (an internal table with device names/MAC addresses)? When creating a parental control, I get an enormous list of devices that aren't in the network any longer, on many pages. I want to rescan the network and eliminate those entries. How do I do that without a factory reset?

I don't mean removing devices from a parental control, I mean removing the decice registrations from the router internal tables so they don't appear as an option when creating a parental control.