diff --git a/boards/models/post.py b/boards/models/post.py
--- a/boards/models/post.py
+++ b/boards/models/post.py
@@ -167,6 +167,7 @@ class Post(models.Model, Viewable):
 
     poster_ip = models.GenericIPAddressField()
 
+    # TODO This field can be removed cause UID is used for update now
     last_edit_time = models.DateTimeField()
 
     referenced_posts = models.ManyToManyField('Post', symmetrical=False,