ＢＩＮＤ：ゾーンの設定でエラーが出ます。解決方法が知りたいです

ＢＩＮＤの起動時にエラーが出てしまうため
どなたかご教授願います

エラー画面は

以前質問されている方の
リンク内容
#　systemctl starts named　は試してみましたが
以下の結果がでます

systemctl status named
上の結果です

#　vi /etc/named.confの設定がこれです

コード

// named.conf
//
// Provided by Red Hat bind package to configure the ISC BIND named(8) DNS
// server as a caching only nameserver (as a localhost DNS resolver only).
//
// See /usr/share/doc/bind*/sample/ for example named configuration files.
//
// See the BIND Administrator's Reference Manual (ARM) for details about the
// configuration located in /usr/share/doc/bind-{version}/Bv9ARM.html

options {
        listen-on port 53 { any; };
        listen-on-v6 port 53 { none; };
        directory       "/var/named";
        dump-file       "/var/named/data/cache_dump.db";
        statistics-file "/var/named/data/named_stats.txt";
        memstatistics-file "/var/named/data/named_mem_stats.txt";
        recursing-file  "/var/named/data/named.recursing";
        secroots-file   "/var/named/data/named.secroots";
       allow-query     { localhost; 192.168.50.39/24; };
        allow-transfer  { localhost; 192.168.50.39/24; };
        /*
         - If you are building an AUTHORITATIVE DNS server, do NOT enable recursion.
         - If you are building a RECURSIVE (caching) DNS server, you need to enable
           recursion.
         - If your recursive DNS server has a public IP address, you MUST enable access
           control to limit queries to your legitimate users. Failing to do so will
           cause your server to become part of large scale DNS amplification
           attacks. Implementing BCP38 within your network would greatly
           reduce such attack surface
        */
        recursion yes;

        dnssec-enable yes;
        dnssec-validation yes;

        /* Path to ISC DLV key */
        bindkeys-file "/etc/named.root.key";

        managed-keys-directory "/var/named/dynamic";

        pid-file "/run/named/named.pid";
        session-keyfile "/run/named/session.key";
};

logging {
        channel default_debug {
                file "data/named.run";
                severity dynamic;
        };
};
view "internal" {
        match-clients {
                localhost;
                192.168.50.39/24;
        };
        zone "." IN {
                type hint;
                file "named.ca";
        };
        zone "hakubook.keyword-on.net" IN {
                type master;
                file "hakubook.keyword-on.net";
                allow-update { none; };
        };
        zone "50.168.192.in-addr.arpa" IN {
                type master;
                file "50.168.192.db";
                allow-update { none; };
include "/etc/named.rfc1912.zones";
include "/etc/named.root.key";
};