cobbler ubuntu distro replicate failure

[root@io-build-01 cobbler]# cobbler replicate --master=io-build-03 --distros="ubuntu-server*"
task started: 2013-04-08_164302_replicate
task started (id=Replicate, time=Mon Apr  8 16:43:02 2013)
cobbler_master      = io-build-03
profile_patterns    = []
system_patterns     = []
repo_patterns       = []
image_patterns      = []
mgmtclass_patterns  = []
package_patterns    = []
file_patterns       = []
omit_data           = False
sync_all            = False
using CLI defined master
XMLRPC endpoint: http://io-build-03/cobbler_api
test ALPHA
test BETA
Querying Both Servers
remote names struct is {'profile': <<<<<snip system list>>>>> }
* Finding Explicit distro Matches
?: seeing if rhel6.0-x86_64 looks like ubuntu-server*
?: seeing if f14-x86_64 looks like ubuntu-server*
?: seeing if rhel5.2-xen-x86_64 looks like ubuntu-server*
?: seeing if rhel5.5-xen-x86_64 looks like ubuntu-server*
?: seeing if rhel5.5-xen-i386 looks like ubuntu-server*
?: seeing if rhel6.2-x86_64 looks like ubuntu-server*
?: seeing if ubuntu-server-1210-x86_64 looks like ubuntu-server*
?: seeing if rhel6.3-x86_64 looks like ubuntu-server*
?: seeing if rhel5.8-xen-x86_64 looks like ubuntu-server*
?: seeing if rhel5.2-x86_64 looks like ubuntu-server*
?: seeing if rhel5.5-i386 looks like ubuntu-server*
?: seeing if rhel5.6-x86_64 looks like ubuntu-server*
?: seeing if rhel5.6-xen-x86_64 looks like ubuntu-server*
?: seeing if rhel5.8-x86_64 looks like ubuntu-server*
?: seeing if rhel5.5-x86_64 looks like ubuntu-server*
* Finding Explicit profile Matches
* Finding Explicit system Matches
* Finding Explicit repo Matches
* Finding Explicit image Matches
* Finding Explicit mgmtclass Matches
* Finding Explicit package Matches
* Finding Explicit file Matches
* Adding Profiles Required By Systems
* Adding Profiles Required By SubProfiles
* Adding Distros Required By Profiles
* Adding Repos Required By Profiles
* Adding Images Required By Systems
transfer list for distro is ['ubuntu-server-1210-x86_64']
transfer list for profile is []
transfer list for system is []
transfer list for repo is []
transfer list for image is []
transfer list for mgmtclass is []
transfer list for package is []
transfer list for file is []
*NOT* Removing Objects Not Stored On Master
Rsyncing distros
Rsyncing distro ubuntu-server-1210-x86_64
Rsyncing repos
Rsyncing distro repo configs
running: rsync -avzH io-build-03::cobbler-distros/config /var/www/cobbler/ks_mirror
received on stdout: receiving file list ... done

sent 44 bytes  received 2316 bytes  4720.00 bytes/sec
total size is 9572  speedup is 4.06

received on stderr:
Rsyncing kickstart templates & snippets
running: rsync -avzH io-build-03::cobbler-kickstarts /var/lib/cobbler/kickstarts
received on stdout: receiving file list ... done

sent 47 bytes  received 1393 bytes  2880.00 bytes/sec
total size is 112990  speedup is 78.47

received on stderr:
running: rsync -avzH io-build-03::cobbler-snippets /var/lib/cobbler/snippets
received on stdout: receiving file list ... done

sent 45 bytes  received 2399 bytes  4888.00 bytes/sec
total size is 141173  speedup is 57.76

received on stderr:
Rsyncing triggers
running: rsync -avzH io-build-03::cobbler-triggers /var/lib/cobbler/triggers
received on stdout: receiving file list ... done

sent 45 bytes  received 846 bytes  1782.00 bytes/sec
total size is 1253  speedup is 1.41

received on stderr:
Removing Objects Not Stored On Local
adding distro ubuntu-server-1210-x86_64
failed to add distro ubuntu-server-1210-x86_64    <========= why????????
Updating Objects Newer On Remote
Linking Distro rhel6.0-x86_64
Linking Distro f14-x86_64
Linking Distro rhel5.2-xen-x86_64
Linking Distro rhel5.5-xen-x86_64
Linking Distro rhel5.5-xen-i386
Linking Distro rhel6.2-x86_64
Linking Distro rhel5.8-x86_64
Linking Distro rhel6.3-x86_64
Linking Distro rhel5.2-x86_64
Linking Distro rhel5.5-i386
Linking Distro rhel5.6-x86_64
Linking Distro rhel5.6-xen-x86_64
Linking Distro rhel5.8-xen-x86_64
Linking Distro rhel5.5-x86_64
Syncing
Done
*** TASK COMPLETE ***