diff --git a/modules/backend/traits/FormModelSaver.php b/modules/backend/traits/FormModelSaver.php
index 3f188ddd6..80c6f66f3 100644
--- a/modules/backend/traits/FormModelSaver.php
+++ b/modules/backend/traits/FormModelSaver.php
@@ -90,7 +90,7 @@ trait FormModelSaver
             $model->addPurgeable($attributesToPurge);
         }
         else {
-            $model->bindEvent('model.saveInternal', function() use ($model, $attributesToPurge) {
+            $model->bindEventOnce('model.saveInternal', function() use ($model, $attributesToPurge) {
                 foreach ($attributesToPurge as $attribute) {
                     unset($model->attributes[$attribute]);
                 }
diff --git a/modules/backend/widgets/Form.php b/modules/backend/widgets/Form.php
index c9ec6cdd1..faa0eb10c 100644
--- a/modules/backend/widgets/Form.php
+++ b/modules/backend/widgets/Form.php
@@ -319,7 +319,10 @@ class Form extends WidgetBase
             $data = $this->getSaveData();
         }
 
-        $this->model->forceFill($data);
+        if (method_exists($this->model, 'forceFill')) {
+            $this->model->forceFill($data);
+        }
+
         $this->data = (object) array_merge((array) $this->data, (array) $data);
 
         foreach ($this->allFields as $field) {