diff --git a/account_payment_order/i18n/account_payment_order.pot b/account_payment_order/i18n/account_payment_order.pot
index beea584f8..e05564455 100644
--- a/account_payment_order/i18n/account_payment_order.pot
+++ b/account_payment_order/i18n/account_payment_order.pot
@@ -1175,6 +1175,16 @@ msgstr ""
 msgid "There are no transactions on payment order %s."
 msgstr ""
 
+#. module: account_payment_order
+#. odoo-python
+#: code:addons/account_payment_order/models/account_payment_order.py:0
+#, python-format
+msgid ""
+"There are several lines pointing to the same pending balance. This is "
+"probably caused by a manual line creation. Please remove this duplication "
+"for being able to save the order."
+msgstr ""
+
 #. module: account_payment_order
 #. odoo-python
 #: code:addons/account_payment_order/models/account_payment_order.py:0