diff --git a/product/ERP5/Document/BusinessProcess.py b/product/ERP5/Document/BusinessProcess.py
index 8fa876980a5a8069f56b62402f49ccba42dc17fd..f58a8f609208458abc7d761281bf7e6f9c2a3d85 100644
--- a/product/ERP5/Document/BusinessProcess.py
+++ b/product/ERP5/Document/BusinessProcess.py
@@ -769,7 +769,7 @@ class BusinessProcess(Path, XMLObject):
     for base_category in ('delivery_mode', 'incoterm', 'payment_mode'):
       value = trade_model_path.getPropertyList(base_category)
       if len(value) > 0:
-        property_dict[base_category] = amount.getPropertyList(base_category) + value
+        property_dict[base_category] = amount.getPropertyList(base_category)
 
     # Amount quantities - XXX-JPS maybe we should consider handling unit conversions here
     # and specifying units