diff --git a/mrp_lot_number_propagation/i18n/it.po b/mrp_lot_number_propagation/i18n/it.po
index 5155922ee..6f0cece28 100644
--- a/mrp_lot_number_propagation/i18n/it.po
+++ b/mrp_lot_number_propagation/i18n/it.po
@@ -91,6 +91,14 @@ msgstr "Propagazione numero di lotto"
 msgid "Lot/Serial Number"
 msgstr "Numero di lotto/matricola"
 
+#. module: mrp_lot_number_propagation
+#: code:addons/mrp_lot_number_propagation/models/mrp_production.py:0
+#, python-format
+msgid ""
+"Lot/Serial number %s already exists and has been used. Unable to propagate "
+"it."
+msgstr ""
+
 #. module: mrp_lot_number_propagation
 #: code:addons/mrp_lot_number_propagation/models/mrp_production.py:0
 #, python-format