Bind server does not start after adding logging in config file

I want to enable query logging permanently and I added these lines to end of my /etc/bind/named.conf.options file

logging {
        channel querylog {
                file "/var/log/querylog";
                severity debug 3;
        };
};

and my file before adding logging section was as below and OK:

options {
        directory "/var/cache/bind";

        // If there is a firewall between you and nameservers you want
        // to talk to, you may need to fix the firewall to allow multiple
        // ports to talk.  See http://www.kb.cert.org/vuls/id/800113

        // If your ISP provided one or more IP addresses for stable
        // nameservers, you probably want to use them as forwarders.
        // Uncomment the following block, and insert the addresses replacing
        // the all-0's placeholder.
        allow-transfer {none;};
        allow-query {any;};
        listen-on port 53 {localhost; MY_PUBLIC_IP;};
        recursion no;
        // forwarders {
        //      0.0.0.0;
        // };

        //========================================================================
        // If BIND logs error messages about the root key being expired,
        // you will need to update your keys.  See https://www.isc.org/bind-keys
        //========================================================================
        dnssec-validation auto;
#       listen-on-v6 { any; };
};

After adding logging section, when I restart my service with sudo systemctl restart named.service, I get this error and the service won't start:

 sudo journalctl -xeu named.service
░░ Defined-By: systemd
░░ Support: http://www.ubuntu.com/support
░░
░░ A stop job for unit named.service has finished.
░░
░░ The job identifier is 5419 and the job result is done.
Dec 07 04:03:07 NS1 systemd[1]: named.service: Start request repeated too quickly.
Dec 07 04:03:07 NS1 systemd[1]: named.service: Failed with result 'exit-code'.
░░ Subject: Unit failed
░░ Defined-By: systemd
░░ Support: http://www.ubuntu.com/support
░░
░░ The unit named.service has entered the 'failed' state with result 'exit-code'.
Dec 07 04:03:07 NS1 systemd[1]: Failed to start BIND Domain Name Server.
░░ Subject: A start job for unit named.service has failed
░░ Defined-By: systemd
░░ Support: http://www.ubuntu.com/support
░░
░░ A start job for unit named.service has finished with a failure.
░░
░░ The job identifier is 5419 and the job result is failed.