hi everyone, may i ask, does anyone knows a way to set this router ipv6 dns address to local cidr (fe80:: range) as i setup docker and runs pihole so i want to point router dhcp dns ip to this pihole instead, there is no issue for me to set ipv4 to local ip (192.168.xxx.xxx) but I cant set the ipv6's one to local cidr.

whenever i try to set the ipv6 dns to static local ip i get this error