Comment 3 for bug 1612061

As noted, this is not a bug in the policy server. It is fixed in the current release of py3dns and will be included in the next release of pydns. Here's the fix for anyone that wants to fix it locally in the mean time:

http://bazaar.launchpad.net/~py3dns-hackers/pydns/trunk/revision/109

Also, The Debian (and derivatives such as Ubuntu) already have this patch included. You may want to contact the distribution maintainer of your pydns package as suggest they add the patch as well.