You update via pihole -up, not pihole -r.
You were running into this issue (dnsmasq was too old), and removing that config line was not the fix:
When you updated Raspbian, you got an up to date version of dnsmasq.
You update via pihole -up, not pihole -r.
You were running into this issue (dnsmasq was too old), and removing that config line was not the fix:
When you updated Raspbian, you got an up to date version of dnsmasq.