How do I stop logging of DNS queries in /var/log/messages ?

CLI Version: 1.37.7
Platform: mipsle (Ubiquiti EdgeRouter X)

I'm using nextdns with dnsmasq on my Edgerouter X.

Here is my nextdns.conf:

auto-activate false
control /var/run/nextdns.sock
config xxxxxx
max-ttl 0s
report-client-info false
max-inflight-requests 256
discovery-dns
mdns disabled
hardened-privacy false
setup-router false
listen 127.0.0.1:53053
cache-size 0
cache-max-age 0s
detect-captive-portals false
bogus-priv true
log-queries false
use-hosts false
timeout 5s

dnsmasq is set up more or less like this (some irrelevant parts removed):

    dns {
        forwarding {
            cache-size 1000
            listen-on switch0.10
            listen-on switch0.20
            options no-resolv
            options query-port=53054
            options server=127.0.0.1#53053
            options bogus-priv
            options domain-needed
            options stop-dns-rebind
        }
    }

Question: How can I stop /var/log/messages filling up with lines like this:
 

ubnt@ubnt:~$ tail /var/log/messages
Dec 30 22:51:42 ubnt nextdns[7797]: Connected [2a00:11c0:8:4::9]:443 (con=9ms tls=34ms, TCP, TLS13)
Dec 30 22:52:13 ubnt nextdns[7797]: Connected [2a00:11c0:8:4::9]:443 (con=9ms tls=34ms, TCP, TLS13)
Dec 30 22:54:14 ubnt nextdns[7797]: Connected [2a00:11c0:8:4::9]:443 (con=12ms tls=62ms, TCP, TLS13)
Dec 30 22:55:35 ubnt nextdns[7797]: Connected [2a00:11c0:8:4::9]:443 (con=9ms tls=34ms, TCP, TLS13)
Dec 30 22:57:13 ubnt nextdns[7797]: Connected 37.252.230.153:443 (con=8ms tls=34ms, TCP, TLS13)
Dec 30 22:58:47 ubnt nextdns[7797]: Connected [2a00:11c0:8:4::9]:443 (con=12ms tls=44ms, TCP, TLS13)
Dec 30 23:00:01 ubnt nextdns[7797]: Connected [2a00:11c0:8:4::9]:443 (con=9ms tls=35ms, TCP, TLS13)
Dec 30 23:01:16 ubnt nextdns[7797]: Connected 209.250.226.191:443 (con=9ms tls=58ms, TCP, TLS13)
Dec 30 23:03:44 ubnt nextdns[7797]: Connected [2a00:11c0:8:4::9]:443 (con=9ms tls=34ms, TCP, TLS13)
Dec 30 23:06:12 ubnt nextdns[7797]: Connected [2a00:11c0:8:4::9]:443 (con=10ms tls=34ms, TCP, TLS13)
ubnt@ubnt:~$

?