diff --git a/mrp_lot_number_propagation/i18n/mrp_lot_number_propagation.pot b/mrp_lot_number_propagation/i18n/mrp_lot_number_propagation.pot
index 2d22b0bca..3f4b0d5e3 100644
--- a/mrp_lot_number_propagation/i18n/mrp_lot_number_propagation.pot
+++ b/mrp_lot_number_propagation/i18n/mrp_lot_number_propagation.pot
@@ -79,6 +79,14 @@ msgstr ""
 msgid "Lot/Serial Number"
 msgstr ""
 
+#. 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