diff --git a/modules/purchase_trade/stock.py b/modules/purchase_trade/stock.py
index 2261e40..0ce1be1 100755
--- a/modules/purchase_trade/stock.py
+++ b/modules/purchase_trade/stock.py
@@ -3183,7 +3183,7 @@ class StatementOfFacts(ModelSQL, ModelView):
     charter_party = fields.Many2One('stock.charter.party', "Charter Party")
     applied_conditions = fields.Function(
         fields.One2Many('charter.condition', '', "Available Conditions"),
-        'on_change_with_applied_conditions')
+        'on_change_with_applied_conditions', setter='set_applied_conditions')
     applied_condition = fields.Many2One(
         'charter.condition', "Applied Condition",
         domain=[('id', 'in', Eval('applied_conditions', []))],
@@ -3389,6 +3389,10 @@ class StatementOfFacts(ModelSQL, ModelView):
     def get_applied_conditions(self, name=None):
         return self.on_change_with_applied_conditions(name)
 
+    @classmethod
+    def set_applied_conditions(cls, statements, name, value):
+        pass
+
     @staticmethod
     def _rate_category(rate):
         rate_type = getattr(rate, 'rate_type', None)