Dhcp not updating reverse lookup

Tested with 6.0 (not modded): Apr 13 tech01 dhcpd[9630]: DHCPREQUEST for 192.168.0.50 from 3e:d9:4b:7a:08:3b (centreon) via eth0Apr 13 tech01 dhcpd[9630]: DHCPACK on 192.168.0.50 to 3e:d9:4b:7a:08:3b (centreon) via eth0Apr 13 tech01 named[9312]: samba_dlz: starting transaction on zone Apr 13 tech01 named[9312]: samba_dlz: spnego update failed Apr 13 tech01 named[9312]: client @0x7f05e86caa20 127.0.0.1#49095/key domain.lan: updating zone 'domain.lan/NONE': update failed: rejected by secure update (REFUSED)Apr 13 tech01 named[9312]: samba_dlz: cancelling transaction on zone Apr 13 tech01 dhcpd[9630]: Unable to add forward map from centreon.

Aug 10 dc1 named[15482]: client 127.0.0.1#60469/key dhcpduser\@INTERNAL. COM: updating zone '1.168.192.in-addr.arpa/IN': update failed: rejected by secure update (REFUSED)Aug 10 dc1 sh[1307]: update failed: REFUSEDAug 10 dc1 dhcpd: DHCP-DNS Update failed: 02Aug 10 dc1 dhcpd[1307]: execute: /etc/dhcp/bin/exit status 512Restart the DNS module from the dashboard.This is a very basic feature of a system like Zentyal, to register DHCP leases into the DNS.If it's broken, you can't claim to have DNS and DHCP sync'ed.LAN in keytab FILE:/etc/dhcp/dhcpduser.keytab (unknown enctype)Jan 13 zen dhcpd[22981]: 13-01-19 [dyndns] : dhcpd kinit for dynamic DNS failed Jan 13 zen dhcpd[29771]: execute: /etc/dhcp/bin/exit status 256Feb 9 x-dc1 dhcpd[2254]: DHCPREQUEST for 192.168.1.14 from bc:c:e3:1c (KX-TGP600RU) via eth0Feb 9 x-dc1 dhcpd[2254]: DHCPACK on 192.168.1.14 to bc:c:e3:1c (KX-TGP600RU) via eth0Feb 9 x-dc1 named[1333]: samba_dlz: starting transaction on zone Feb 9 x-dc1 named[1333]: samba_dlz: spnego update failed Feb 9 x-dc1 named[1333]: client @0x7f995800b8b0 127.0.0.1#33377/key x.lan: updating zone 'x.lan/NONE': update failed: rejected by secure update (REFUSED)Feb 9 x-dc1 named[1333]: samba_dlz: cancelling transaction on zone Feb 9 x-dc1 dhcpd[2254]: Unable to add forward map from KX-TGP600RU.to 192.168.1.14: REFUSEDThat topic is not solved anymore and is a real pain.