named error log

["Daniel Tan" <danieltan shopnsave com sg>]

i would like to know what these errors mean?
why did it failed?

Sep  1 12:57:13 mail named[32135]: client 192.168.0.72#3400: update
'0.168.192.i
n-addr.arpa/IN' denied
Sep  1 13:05:36 mail named[32135]: client 192.168.0.217#4911: updating zone
'sho
pnsave.com.sg/IN': update failed: 'RRset exists (value dependent)'
prerequisite
not satisfied (NXRRSET)
Sep  1 13:05:36 mail named[32135]: client 192.168.0.217#4914: update
'shopnsave.
com.sg/IN' denied
Sep  1 13:05:36 mail named[32135]: client 192.168.0.217#4919: update
'0.168.192.
in-addr.arpa/IN' denied
Sep  1 13:22:50 mail named[32135]: client 192.168.0.218#2710: updating zone
'sho
pnsave.com.sg/IN': update failed: 'RRset exists (value dependent)'
prerequisite
not satisfied (NXRRSET)
Sep  1 13:22:50 mail named[32135]: client 192.168.0.218#2713: update
'shopnsave.
com.sg/IN' denied
Sep  1 13:22:50 mail named[32135]: client 192.168.0.218#2718: update
'0.168.192.
in-addr.arpa/IN' denied
Sep  1 13:34:43 mail named[32135]: client 10.0.133.12#2967: updating zone
'shopn
save.com.sg/IN': update failed: 'RRset exists (value dependent)'
prerequisite no
t satisfied (NXRRSET)
Sep  1 13:34:43 mail named[32135]: client 10.0.133.12#2970: update
'shopnsave.co
m.sg/IN' denied

Regards,
Daniel Tan
67469188 Ext.665
DID: 68430665
MIS Department
Shop N Save Pte Ltd
: danieltan shopnsave com sg

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