diff --git a/src/applications/maniphest/editor/ManiphestTransactionEditorPro.php b/src/applications/maniphest/editor/ManiphestTransactionEditorPro.php
index 617ecede6a..fe992aa1a0 100644
--- a/src/applications/maniphest/editor/ManiphestTransactionEditorPro.php
+++ b/src/applications/maniphest/editor/ManiphestTransactionEditorPro.php
@@ -15,6 +15,7 @@ final class ManiphestTransactionEditorPro
     $types[] = ManiphestTransactionPro::TYPE_CCS;
     $types[] = ManiphestTransactionPro::TYPE_PROJECTS;
     $types[] = ManiphestTransactionPro::TYPE_ATTACH;
+    $types[] = ManiphestTransactionPro::TYPE_EDGE;
 
     return $types;
   }
@@ -40,6 +41,9 @@ final class ManiphestTransactionEditorPro
         return $object->getProjectPHIDs();
       case ManiphestTransactionPro::TYPE_ATTACH:
         return $object->getAttached();
+      case ManiphestTransactionPro::TYPE_EDGE:
+        // These are pre-populated.
+        return $xaction->getOldValue();
     }
 
   }
@@ -58,6 +62,7 @@ final class ManiphestTransactionEditorPro
       case ManiphestTransactionPro::TYPE_CCS:
       case ManiphestTransactionPro::TYPE_PROJECTS:
       case ManiphestTransactionPro::TYPE_ATTACH:
+      case ManiphestTransactionPro::TYPE_EDGE:
         return $xaction->getNewValue();
     }
 
@@ -84,6 +89,10 @@ final class ManiphestTransactionEditorPro
         return $object->setProjectPHIDs($xaction->getNewValue());
       case ManiphestTransactionPro::TYPE_ATTACH:
         return $object->setAttached($xaction->getNewValue());
+      case ManiphestTransactionPro::TYPE_EDGE:
+        // These are a weird, funky mess and are already being applied by the
+        // time we reach this.
+        return;
     }
 
   }
diff --git a/src/applications/maniphest/event/ManiphestEdgeEventListener.php b/src/applications/maniphest/event/ManiphestEdgeEventListener.php
index 2e79789619..1fbae1f9fa 100644
--- a/src/applications/maniphest/event/ManiphestEdgeEventListener.php
+++ b/src/applications/maniphest/event/ManiphestEdgeEventListener.php
@@ -55,9 +55,16 @@ final class ManiphestEdgeEventListener extends PhutilEventListener {
     unset($this->edges[$id]);
     unset($this->tasks[$id]);
 
+    $content_source = PhabricatorContentSource::newForSource(
+      PhabricatorContentSource::SOURCE_LEGACY,
+      array());
+
     $new_edges = $this->loadAllEdges($event);
-    $editor = new ManiphestTransactionEditor();
-    $editor->setActor($event->getUser());
+    $editor = id(new ManiphestTransactionEditorPro())
+      ->setActor($event->getUser())
+      ->setContentSource($content_source)
+      ->setContinueOnNoEffect(true)
+      ->setContinueOnMissingFields(true);
 
     foreach ($tasks as $phid => $task) {
       $xactions = array();
@@ -74,16 +81,11 @@ final class ManiphestEdgeEventListener extends PhutilEventListener {
           continue;
         }
 
-        $xactions[] = id(new ManiphestTransaction())
+        $xactions[] = id(new ManiphestTransactionPro())
           ->setTransactionType(ManiphestTransactionType::TYPE_EDGE)
           ->setOldValue($old_type)
           ->setNewValue($new_type)
-          ->setMetadataValue('edge:type', $type)
-          ->setContentSource(
-            PhabricatorContentSource::newForSource(
-              PhabricatorContentSource::SOURCE_LEGACY,
-              array()))
-          ->setAuthorPHID($event->getUser()->getPHID());
+          ->setMetadataValue('edge:type', $type);
       }
 
       if ($xactions) {
diff --git a/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php b/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php
index 254969cb2b..09d4b44740 100644
--- a/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php
+++ b/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php
@@ -657,8 +657,17 @@ abstract class PhabricatorApplicationTransactionEditor
           "You can not apply transactions which already have commentVersions!");
       }
 
-      $custom_field_type = PhabricatorTransactions::TYPE_CUSTOMFIELD;
-      if ($xaction->getTransactionType() != $custom_field_type) {
+      $exempt_types = array(
+        // CustomField logic currently prefills these before we enter the
+        // transaction editor.
+        PhabricatorTransactions::TYPE_CUSTOMFIELD => true,
+
+        // TODO: Remove this, this edge type is encumbered with a bunch of
+        // legacy nonsense.
+        ManiphestTransactionPro::TYPE_EDGE => true,
+      );
+
+      if (empty($exempt_types[$xaction->getTransactionType()])) {
         if ($xaction->getOldValue() !== null) {
           throw new Exception(
             "You can not apply transactions which already have oldValue!");