diff --git a/resources/sql/autopatches/20180326.lock.03.nonunique.sql b/resources/sql/autopatches/20180326.lock.03.nonunique.sql
new file mode 100644
--- /dev/null
+++ b/resources/sql/autopatches/20180326.lock.03.nonunique.sql
@@ -0,0 +1,2 @@
+ALTER TABLE {$NAMESPACE}_repository.repository_pushevent
+  DROP KEY `key_request`;
diff --git a/src/applications/repository/storage/PhabricatorRepositoryPushEvent.php b/src/applications/repository/storage/PhabricatorRepositoryPushEvent.php
--- a/src/applications/repository/storage/PhabricatorRepositoryPushEvent.php
+++ b/src/applications/repository/storage/PhabricatorRepositoryPushEvent.php
@@ -46,9 +46,8 @@
         'key_repository' => array(
           'columns' => array('repositoryPHID'),
         ),
-        'key_request' => array(
+        'key_identifier' => array(
           'columns' => array('requestIdentifier'),
-          'unique' => true,
         ),
       ),
     ) + parent::getConfiguration();