samba - Jul 2014 - samba4 Administering DNS, 'WERR_INTERNAL_DB_ERROR'

i have installed samba4 and set the reverse zone for the dc (10.2.1.6) ,

using the following commands to add my clients
    samba-tool dns add 10.2.1.6 sat.com imhotep.sat.co.uk A 10.2.1.2
    samba-tool dns add 10.2.1.6 1.2.10.in-addr.arpa 2 PTR imhotep.sat.co.uk

i get the following returned for both commands

ERROR(runtime): uncaught exception - (1383, 'WERR_INTERNAL_DB_ERROR')
  File "/usr/lib/python2.7/site-packages/samba/netcmd/__init__.py",
line
175, in _run
    return self.run(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/samba/netcmd/dns.py", line
1067, in run
    0, server, zone, name, add_rec_buf, None


could my dns zone records be corrupt ?

shadrock