How to add PTR Record for reverse DNS ipv6 with scaleway dedibox

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Here is an example for bind configuration provided by Scaleway documentation

https://documentation.online.net/en/dedicated-server/network/dns-delegation

;
; 2001:bc8:3398::/48
;
; Zone file built with the IPv6 Reverse DNS zone builder
; http://rdns6.com/
;
$TTL 1h ; Default TTL
8.9.3.3.8.c.b.0.1.0.0.2.ip6.arpa.       IN      SOA     ns1.domain.fr  webmaster.domain.fr (
        2016071503      ; serial
        1h              ; slave refresh interval
        15m             ; slave retry interval
        1w              ; slave copy expire time
        1h              ; NXDOMAIN cache time
        )

;
; domain name servers
;
@       IN      NS      ns1.domain.fr.
@       IN      NS      ns2.domain.fr.


; IPv6 PTR entries
1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.9.3.3.8.c.b.0.1.0.0.2.ip6.arpa.    IN    PTR    toto.domain.fr.

Would I need to apply that in my /etc/nsd/zones/box.mydomain.com.txt file directly ?
I did try adding only the last line PTR, and I got different error instead of NXDOMAIN got NXFAILED…
I have try in the file /etc/bind/named.conf.local but it doesn’t work

If anyone can advise on this… :nerd_face: