diff --git a/docs/changelog/7.x.x.txt b/docs/changelog/7.x.x.txt
index 3eda287cc..fba7c0f4c 100644
--- a/docs/changelog/7.x.x.txt
+++ b/docs/changelog/7.x.x.txt
@@ -1,4 +1,5 @@
 7.10.22
+ - fixed #12206: Bad Subscription Groups in Duplicated Threads
 
 7.10.21
  - added #9668 extension template variable to attachment loops for the following assets:
diff --git a/lib/WebGUI/Asset/Post/Thread.pm b/lib/WebGUI/Asset/Post/Thread.pm
index 3b3bfb40d..0c69584c9 100644
--- a/lib/WebGUI/Asset/Post/Thread.pm
+++ b/lib/WebGUI/Asset/Post/Thread.pm
@@ -268,15 +268,17 @@ sub duplicate {
     my $self       = shift;
     my $session    = $self->session;
     my $copy       = $self->SUPER::duplicate(@_);
-    my $oldGroupId = $self->get('subscriptionGroupId');
+    my $key        = 'subscriptionGroupId';
+    my $oldGroupId = $self->get($key);
 
     if ($oldGroupId) {
-        my $newGroup = WebGUI::Group->new($session, 'new');
-        my $oldGroup = WebGUI::Group->new($session, $oldGroupId);
-        if ($oldGroup) {
+        $copy->update({ $key => '' });
+        $copy->createSubscriptionGroup();
+        if (my $oldGroup = WebGUI::Group->new($session, $oldGroupId)) {
+            my $newGroup = WebGUI::Group->new($session, $copy->get($key));
             $newGroup->addUsers($oldGroup->getUsers('withoutExpired'));
+            $newGroup->addGroups($oldGroup->getGroupsIn);
         }
-        $copy->update({subscriptionGroupId => $newGroup->getId});
     }
     return $copy;
 }
diff --git a/t/Asset/Post/Thread/bug_12206_bad_subscription_groups_in_duplicate.t b/t/Asset/Post/Thread/bug_12206_bad_subscription_groups_in_duplicate.t
new file mode 100644
index 000000000..c2bd5390b
--- /dev/null
+++ b/t/Asset/Post/Thread/bug_12206_bad_subscription_groups_in_duplicate.t
@@ -0,0 +1,46 @@
+# vim:syntax=perl
+#-------------------------------------------------------------------
+# WebGUI is Copyright 2001-2009 Plain Black Corporation.
+#-------------------------------------------------------------------
+# Please read the legal notices (docs/legal.txt) and the license
+# (docs/license.txt) that came with this distribution before using
+# this software.
+#------------------------------------------------------------------
+# http://www.plainblack.com                     info@plainblack.com
+#------------------------------------------------------------------
+
+=head1 BUG DESCRIPTION
+
+When Thread assets are copied, a new subscription group gets created for them,
+but not by calling $thread->createSubscriptionGroup. Instead, a "blank" group
+is created, and then the users from the old group are added to it -- which by
+default has Admins subscribed in it. So, every time we copy a thread, our
+admins start getting spammed with subscription updates.
+
+=cut
+
+use warnings;
+use strict;
+
+use Test::More tests => 2;
+use Test::Exception;
+use FindBin;
+
+use lib "$FindBin::Bin/../../../lib";
+use WebGUI::Test;
+use WebGUI::Asset;
+
+my $session = WebGUI::Test->session;
+my $thread  = WebGUI::Asset->getImportNode($session)->addChild(
+    {
+        className => 'WebGUI::Asset::Post::Thread',
+    }
+);
+WebGUI::Test->addToCleanup($thread);
+$thread->createSubscriptionGroup();
+my $admin = WebGUI::User->new($session, 3);
+ok !$admin->isInGroup($thread->get('subscriptionGroupId'));
+
+$thread = $thread->duplicate();
+WebGUI::Test->addToCleanup($thread);
+ok !$admin->isInGroup($thread->get('subscriptionGroupId'));