diff --git a/ereuse_devicehub/inventory/forms.py b/ereuse_devicehub/inventory/forms.py
index 841dcb15..b65079fa 100644
--- a/ereuse_devicehub/inventory/forms.py
+++ b/ereuse_devicehub/inventory/forms.py
@@ -113,7 +113,7 @@ class LotForm(FlaskForm):
         return self.id
 
     def remove(self):
-        if self.instance and not self.instance.devices:
+        if self.instance and not self.instance.trade:
             self.instance.delete()
             db.session.commit()
         return self.instance
diff --git a/ereuse_devicehub/inventory/views.py b/ereuse_devicehub/inventory/views.py
index 42e0f67f..089a1920 100644
--- a/ereuse_devicehub/inventory/views.py
+++ b/ereuse_devicehub/inventory/views.py
@@ -211,9 +211,8 @@ class LotDeleteView(View):
 
     def dispatch_request(self, id):
         form = LotForm(id=id)
-        if form.instance.devices:
-            msg = ("Sorry, the lot cannot be deleted because it still "
-                "has associated devices. Only empty lots can be deleted")
+        if form.instance.trade:
+            msg = "Sorry, the lot cannot be deleted because have a trade action "
             messages.error(msg)
             next_url = url_for('inventory.devices.lotdevicelist', lot_id=id)
             return flask.redirect(next_url)