[Samba] problem whith samba and dnsupdate command

[jmpatagonia]

Problem whith dnsupdate -->

/etc/samba#  samba_dnsupdate --all-names --fail-immediately
Failed to get Kerberos credentials, falling back to samba-tool: kinit for
DOMAIN-SERVER2$@POLICIA2.RIONEGRO.GOV.AR failed (Cannot contact any KDC for
requested realm)

ERROR(runtime): uncaught exception - (9711,
'WERR_DNS_ERROR_RECORD_ALREADY_EXISTS')
  File "/usr/lib/python2.7/dist-packages/samba/netcmd/__init__.py", line
176, in _run
    return self.run(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/samba/netcmd/dns.py", line 940, in
run
    raise e

My dns server is a "dnmasq" and it is on another server.

cat /etc/resolv.conf
nameserver 10.xx.x.xx


regards.