diff --git a/db/migrate/20110422152027_move_notices_to_separate_collection.rb b/db/migrate/20110422152027_move_notices_to_separate_collection.rb
index 604531a..61f4285 100644
--- a/db/migrate/20110422152027_move_notices_to_separate_collection.rb
+++ b/db/migrate/20110422152027_move_notices_to_separate_collection.rb
@@ -5,6 +5,10 @@ class MoveNoticesToSeparateCollection < Mongoid::Migration
     errs = mongo_db.collection("errs").find({ }, :fields => ["notices"])
     errs.each do |err|
       next unless err['notices']
+      
+      # This Err was created after the Problem->Err->Notice redesign
+      next if err['app_id'].nil? or err['problem_id']
+      
       e = Err.find(err['_id'])
       # disable email notifications
       old_notify = e.app.notify_on_errs?
--
libgit2 0.21.2