diff --git a/InvenTree/order/models.py b/InvenTree/order/models.py
index 4f594497bf..935f7e244d 100644
--- a/InvenTree/order/models.py
+++ b/InvenTree/order/models.py
@@ -882,6 +882,8 @@ class OrderAdditionalLineItem(OrderLineItem):
 
     class Meta:
         abstract = True
+        unique_together = [
+        ]
 
     sale_price = InvenTreeModelMoneyField(
         max_digits=19,
@@ -897,10 +899,6 @@ class OrderAdditionalLineItem(OrderLineItem):
     def sale_price_converted_currency(self):
         return currency_code_default()
 
-    class Meta:
-        unique_together = [
-        ]
-
 
 class PurchaseOrderLineItem(OrderLineItem):
     """ Model for a purchase order line item.