diff --git a/app/DataMapper/InvoiceItem.php b/app/DataMapper/InvoiceItem.php
index e2fcb21f0c..af6080de13 100644
--- a/app/DataMapper/InvoiceItem.php
+++ b/app/DataMapper/InvoiceItem.php
@@ -52,8 +52,10 @@ class InvoiceItem
 
     public $custom_value4 = '';
 
+    public $invoice_item_type_id = 1;
 
     public static $casts = [
+        'invoice_item_type_id' => 'string',
         'quantity' => 'float',
         'cost' => 'float',
         'product_key' => 'string',
diff --git a/app/Helpers/Invoice/InvoiceItemSum.php b/app/Helpers/Invoice/InvoiceItemSum.php
index 2dc8be53a3..d03c9629e5 100644
--- a/app/Helpers/Invoice/InvoiceItemSum.php
+++ b/app/Helpers/Invoice/InvoiceItemSum.php
@@ -282,8 +282,12 @@ class InvoiceItemSum
 		foreach($invoice_item as $key => $value)
 		{
 
-			if(!property_exists($this->item, $key))
+			if(!property_exists($this->item, $key) || !isset($this->item->{$key})){
+				$this->item->{$key} = $value;
 				$this->item->{$key} = BaseSettings::castAttribute(InvoiceItem::$casts[$key], $value);
+			}			
+
+
 		}