diff --git a/app/controllers/managements_controller.rb b/app/controllers/managements_controller.rb
index 8f6baa03..e4c7ea0f 100644
--- a/app/controllers/managements_controller.rb
+++ b/app/controllers/managements_controller.rb
@@ -30,7 +30,7 @@ class ManagementsController < ApplicationController
 
   def user_agents
     @user_agents = UserAgent.joins("JOIN users u ON u.login = user_agents.key")
-                       .where("user_agents.key is not null and is_delete = 0").order("created_at desc")
+                       .where("user_agents.key is not null and is_delete = 0 and users.login is not null").order("created_at desc")
     @agents_count = @user_agents.count
     limit = 20
     @agents_pages = Paginator.new @agents_count, limit, params['page'] || 1