diff --git a/app/controllers/admin/ng_words/keywords_controller.rb b/app/controllers/admin/ng_words/keywords_controller.rb
index 9af38fab7b..10969204e8 100644
--- a/app/controllers/admin/ng_words/keywords_controller.rb
+++ b/app/controllers/admin/ng_words/keywords_controller.rb
@@ -21,6 +21,10 @@ module Admin
       false
     end
 
+    def avoid_save?
+      true
+    end
+
     private
 
     def after_update_redirect_path
diff --git a/app/controllers/admin/ng_words_controller.rb b/app/controllers/admin/ng_words_controller.rb
index f052843475..f0d7142500 100644
--- a/app/controllers/admin/ng_words_controller.rb
+++ b/app/controllers/admin/ng_words_controller.rb
@@ -13,6 +13,12 @@ module Admin
 
       return unless validate
 
+      if avoid_save?
+        flash[:notice] = I18n.t('generic.changes_saved_msg')
+        redirect_to after_update_redirect_path
+        return
+      end
+
       @admin_settings = Form::AdminSettings.new(settings_params)
 
       if @admin_settings.save
@@ -33,6 +39,10 @@ module Admin
       admin_ng_words_path
     end
 
+    def avoid_save?
+      false
+    end
+
     private
 
     def settings_params
@@ -40,7 +50,7 @@ module Admin
     end
 
     def settings_params_test
-      params.require(:form_admin_settings)[:ng_words_test]
+      params.expect(form_admin_settings: [ng_words_test: [keywords: [], strangers: [], temporary_ids: []]])['ng_words_test']
     end
   end
 end
diff --git a/app/controllers/system_css_controller.rb b/app/controllers/system_css_controller.rb
index a19728bbfd..dd90491894 100644
--- a/app/controllers/system_css_controller.rb
+++ b/app/controllers/system_css_controller.rb
@@ -1,16 +1,8 @@
 # frozen_string_literal: true
 
 class SystemCssController < ActionController::Base # rubocop:disable Rails/ApplicationController
-  before_action :set_user_roles
-
   def show
     expires_in 3.minutes, public: true
     render content_type: 'text/css'
   end
-
-  private
-
-  def set_user_roles
-    @user_roles = UserRole.providing_styles
-  end
 end
diff --git a/app/views/custom_css/show_system.css.erb b/app/views/custom_css/show_system.css.erb
index 72f0281aa1..e69de29bb2 100644
--- a/app/views/custom_css/show_system.css.erb
+++ b/app/views/custom_css/show_system.css.erb
@@ -1,6 +0,0 @@
-<%- @user_roles.each do |role| %>
-.user-role-<%= role.id %> {
-  --user-role-accent: <%= role.color %>;
-}
-
-<%- end %>