diff --git a/composer.json b/composer.json
index 83cdd30..8750ef4 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,7 @@
   "name": "quaderno/quaderno",
   "type": "library",
   "description": "PHP wrapper for the Quaderno REST API",
-  "version": "1.6.3",
+  "version": "1.6.4",
   "keywords": ["billing","receipts", "invoices", "stripe", "paypal", "braintree", "gocardless", "vat", "gst"],
   "homepage": "https://github.com/quaderno/quaderno-php",
   "license": "MIT",
diff --git a/quaderno_model.php b/quaderno_model.php
index f1fd297..31f5232 100755
--- a/quaderno_model.php
+++ b/quaderno_model.php
@@ -113,8 +113,6 @@ public function save()
 			if ($new_data) $this->data = $new_data->data;
 		}
 
-		$new_data = (isset($this->data['items_attributes']) && !$new_object);
-
 		/**
 		* 3rd step - Update object
 		* Update object - This is only necessary when it's not a new object, or new payments have been created.