Index: resources/sql/autopatches/20140115.auth.1.id.sql
===================================================================
--- /dev/null
+++ resources/sql/autopatches/20140115.auth.1.id.sql
@@ -0,0 +1,8 @@
+ALTER TABLE {$NAMESPACE}_user.phabricator_session
+  DROP PRIMARY KEY;
+
+ALTER TABLE {$NAMESPACE}_user.phabricator_session
+  ADD id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY FIRST;
+
+ALTER TABLE {$NAMESPACE}_user.phabricator_session
+  ADD KEY `key_identity` (userPHID, type);
Index: src/applications/auth/storage/PhabricatorAuthSession.php
===================================================================
--- src/applications/auth/storage/PhabricatorAuthSession.php
+++ src/applications/auth/storage/PhabricatorAuthSession.php
@@ -15,7 +15,6 @@
 
   public function getConfiguration() {
     return array(
-      self::CONFIG_IDS => self::IDS_MANUAL,
       self::CONFIG_TIMESTAMPS => false,
     ) + parent::getConfiguration();
   }
@@ -39,17 +38,6 @@
     return $this->assertAttached($this->identityObject);
   }
 
-  public function delete() {
-    // TODO: We don't have a proper `id` column yet, so make this work as
-    // expected until we do.
-    queryfx(
-      $this->establishConnection('w'),
-      'DELETE FROM %T WHERE sessionKey = %s',
-      $this->getTableName(),
-      $this->getSessionKey());
-    return $this;
-  }
-
 /* -(  PhabricatorPolicyInterface  )----------------------------------------- */