diff --git a/purchase.py b/purchase.py
index 840d84279e..e87f90fbea 100644
--- a/purchase.py
+++ b/purchase.py
@@ -47,11 +47,6 @@ class RequestQuotation(IncotermMixin, metaclass=PoolMeta):
         super().__setup__()
         cls.incoterm_location.search_context['incoterm_type'] = 'purchase'
 
-    @classmethod
-    def _incoterm_editable_states(cls):
-        return ~Eval('state').in_(
-            ['draft', 'sent', 'rejected', 'received', 'cancelled']), ['state']
-
     @classmethod
     def _incoterm_related_party(cls):
         return Eval('supplier'), {'supplier'}