Centos BIND server: Unable to start named daemon

I've installed a fresh Centos server and installed bind and bind-utils to it.
The content of /etc/named.conf is:

# create new
 options {
    directory "/var/named";
    allow-query { localhost; 10.1.2.0/24; };
    allow-transfer { localhost; 10.1.2.0/24; };
    recursion yes;
};
controls {
    inet 127.0.0.1 allow { localhost; } keys { rndckey; };
};
view "internal" {
    match-clients {
        localhost;
        10.1.2.0/24;
    };
    zone "." IN {
        type hint;
        file "named.ca";
    };
    zone "amadeus.netvision" IN {
        type master;
        file "amadeus.netvision.lan";
        allow-update { none; };
    };
    zone "0.0.10.in-addr.arpa" IN {
        type master;
        file "0.0.10.db";
        allow-update { none; };
    };
    zone "localdomain" IN {
        type master;
        file "localdomain.zone";
        allow-update { none; };
    };
    zone "localhost" IN {
        type master;
        file "localhost.zone";
        allow-update { none; };
    };
    zone "0.0.127.in-addr.arpa" IN {
        type master;
        file "named.local";
        allow-update { none; };
    };
    zone "255.in-addr.arpa" IN {
        type master;
        file "named.broadcast";
        allow-update { none; };
    };
    zone "0.in-addr.arpa" IN {
        type master;
        file "named.zero";
        allow-update { none; };
    };
};
view "external" {
    match-clients { any; };
    allow-query { any; };
    recursion no;
    zone "amadeus.netvision" IN {
        type master;
        file "amadeus.netvision.wan";
        allow-update { none; };
    };
};
include "/etc/rndc.key";

# allow-query ⇒ query range you permit
# allow-transfer ⇒ the range you permit to transfer zone info
# recursion ⇒ allow or not to search recursively
# view "internal" { *** }; ⇒ write for internal definition
# view "external" { *** }; ⇒ write for external definition
# For How to write for reverse resolving, Write network address reversely like below.
# 10.1.2.0/24
# network address⇒ 10.1.2.0
# range of network⇒ 10.1.2.0 - 10.0.0.255
# how to write⇒ 0.0.10.in-addr.arpa
# 172.16.0.80/29
# network address⇒ 172.16.0.80
# range of network⇒ 172.16.0.80 - 172.16.0.87
# how to write⇒ 80.0.16.172.in-addr.arpa

When I try to start the named daemon i get the following error:

[root@srv ~]# service named restart
Stopping named:                                            [  OK  ]
Starting named: 
Error in named configuration:
/etc/named.conf:9: unknown key 'rndckey'
                                                           [FAILED]
[root@srv ~]#

I don't understand what I'm doing wrong, I've created the rndc.key using the next command:
rndc-confgen -a -c /etc/rndc.key and it created the key but I still get the same error.
The file is present in the correct path: /etc/rndc.key and it's included in the /etc/named.conf file.