diff --git a/themes/grav/app/forms/fields/parents.js b/themes/grav/app/forms/fields/parents.js
index ba2d5ac8..db0896cb 100644
--- a/themes/grav/app/forms/fields/parents.js
+++ b/themes/grav/app/forms/fields/parents.js
@@ -175,7 +175,7 @@ const getExtraFormData = (container) => {
     data['form-nonce'] = form.find('[name="form-nonce"]').val();
 
     if (unique_id.length) {
-        data['__form-name__'] = unique_id.val();
+        data['__unique_form_id__'] = unique_id.val();
     }
 
     return data;