Generate changes/notifications only on real change

weblate/trans/models.py

@@ -2147,6 +2147,7 @@ class Unit(models.Model):
         self.translation.update_stats()
 
         # Notify subscribed users about new translation
+        if saved:
             subscriptions = Profile.objects.subscribed_any_translation(
                 self.translation.subproject.project,
                 self.translation.language
@@ -2155,7 +2156,7 @@ class Unit(models.Model):
                 subscription.notify_any_translation(self, oldunit)
 
         # Generate Change object for this change
-        if gen_change:
+        if saved and gen_change:
             # Get list of subscribers for new contributor
             subscriptions = Profile.objects.subscribed_new_contributor(
                 self.translation.subproject.project,