what does this named error mean?

[Jeff Davis]

I have been having problems with named stopping recently and so I set 
ndc to debug mode. Later when it stopped again mysteriously, I looked in 
syslog and saw the follwoing error message. Can someone describe it?

Feb 17 14:39:57 dynworks1 named[30075]: unapproved AXFR from 
[209.181.17.143].2368 for "64.71.190.34" (not master/slave)

Thanks,
  Jeff Davis