diff --git a/classes/Profile_list.php b/classes/Profile_list.php
index 4e8b231e19..6e2eaf38d3 100644
--- a/classes/Profile_list.php
+++ b/classes/Profile_list.php
@@ -60,7 +60,6 @@ class Profile_list extends Managed_DataObject
             'primary key' => array('tagger', 'tag'),
             'unique keys' => array(
                 'profile_list_id_key' => array('id'),
-                'profile_list_tag_key' => array('tag'),
             ),
             'foreign keys' => array(
                 'profile_list_tagger_fkey' => array('profile', array('tagger' => 'id')),
diff --git a/classes/Profile_tag.php b/classes/Profile_tag.php
index 02fae227a4..18018664bb 100644
--- a/classes/Profile_tag.php
+++ b/classes/Profile_tag.php
@@ -41,7 +41,6 @@ class Profile_tag extends Managed_DataObject
             'foreign keys' => array(
                 'profile_tag_tagger_fkey' => array('profile', array('tagger' => 'id')),
                 'profile_tag_tagged_fkey' => array('profile', array('tagged' => 'id')),
-                'profile_tag_tag_fkey' => array('profile_list', array('tag' => 'tag')),
             ),
             'indexes' => array(
                 'profile_tag_modified_idx' => array('modified'),