diff --git a/addons/point_of_sale/static/src/xml/Screens/ProductScreen/Orderline.xml b/addons/point_of_sale/static/src/xml/Screens/ProductScreen/Orderline.xml
index e0d44c76163..e4ede636513 100644
--- a/addons/point_of_sale/static/src/xml/Screens/ProductScreen/Orderline.xml
+++ b/addons/point_of_sale/static/src/xml/Screens/ProductScreen/Orderline.xml
@@ -62,7 +62,7 @@
             </ul>
             <t t-if="props.line.get_lot_lines()">
                 <ul class="info-list">
-                    <t t-foreach="props.line.get_lot_lines()" t-as="lot">
+                    <t t-foreach="props.line.get_lot_lines()" t-as="lot" t-key="lot.cid">
                         <li>
                             SN <t t-esc="lot.attributes['lot_name']"/>
                         </li>
diff --git a/addons/point_of_sale/static/src/xml/Screens/ReceiptScreen/OrderReceipt.xml b/addons/point_of_sale/static/src/xml/Screens/ReceiptScreen/OrderReceipt.xml
index b4b0f588cfb..1fbb7c17181 100644
--- a/addons/point_of_sale/static/src/xml/Screens/ReceiptScreen/OrderReceipt.xml
+++ b/addons/point_of_sale/static/src/xml/Screens/ReceiptScreen/OrderReceipt.xml
@@ -93,7 +93,7 @@
                     <t t-if="line.pack_lot_lines">
                         <div class="pos-receipt-left-padding">
                             <ul>
-                                <t t-foreach="line.pack_lot_lines" t-as="lot">
+                                <t t-foreach="line.pack_lot_lines" t-as="lot" t-key="lot.cid">
                                     <li>
                                         SN <t t-esc="lot.attributes['lot_name']"/>
                                     </li>