diff --git a/src/applications/repository/storage/PhabricatorRepositoryCommit.php b/src/applications/repository/storage/PhabricatorRepositoryCommit.php
--- a/src/applications/repository/storage/PhabricatorRepositoryCommit.php
+++ b/src/applications/repository/storage/PhabricatorRepositoryCommit.php
@@ -99,6 +99,9 @@
           'unique' => true,
         ),
       ),
+      self::CONFIG_NO_MUTATE => array(
+        'importStatus',
+      ),
     ) + parent::getConfiguration();
   }