How can I setup two or multiple reverse zone for one IP with bind9?

0x30c4 asked:

When I try to define reverse zone with same IP the as reverse zone named-checkconf throws:

$ named-checkconf named.conf.cust_zone
named.conf:63: zone '70.231.168.192.in-addr.arpa': already exists previous definition: named.conf:52                                                                                                             

My config file.

...
// zone for the 1st domain

zone "domain_1.com"{
    type master;    
    file "file"
}

// reverse zone for 1st domain 

zone "70.231.168.192.in-addr.arpa" {
    type master;
    file "file";                                                                                                                                                                   }

// zone for the 2nd domain

zone "domain_2.com"{
    type master;    
    file "file"
}

// reverse zone for 2nd domain 

zone "70.231.168.192.in-addr.arpa" {
    type master;
    file "file";
}
...

It works when I change one of the reverse zone name. But I am not sure would it work ?

So, is there are any way to configure two reverse zone for one IP ?