diff --git a/account_payment_order/models/account_move_line.py b/account_payment_order/models/account_move_line.py
index 5389b1c9d..0f9fadd3b 100644
--- a/account_payment_order/models/account_move_line.py
+++ b/account_payment_order/models/account_move_line.py
@@ -81,7 +81,6 @@ class AccountMoveLine(models.Model):
 
     def _prepare_payment_line_vals(self, payment_order):
         self.ensure_one()
-        assert payment_order, "Missing payment order"
         communication_type, communication = self._get_communication()
         if self.currency_id:
             currency_id = self.currency_id.id
diff --git a/account_payment_order/readme/CONTRIBUTORS.rst b/account_payment_order/readme/CONTRIBUTORS.rst
index acf4c751b..795a7f0f7 100644
--- a/account_payment_order/readme/CONTRIBUTORS.rst
+++ b/account_payment_order/readme/CONTRIBUTORS.rst
@@ -11,6 +11,8 @@
 * Angel Moya <angel.moya@domatix.com>
 * Jose María Alzaga <jose.alzaga@aselcis.com>
 * Meyomesse Gilles <meyomesse.gilles@gmail.com>
+* Denis Roussel <denis.roussel@acsone.eu>
+
 * `DynApps <https://www.dynapps.be>`_:
 
   * Raf Ven <raf.ven@dynapps.be>