Fix relations error in tags

vendor/built_in_modules/announcement/app/models/bulletin.rb

@@ -8,7 +8,7 @@ class Bulletin
   has_one :title, :class_name => "I18nVariable", :as => :language_value, :autosave => true, :dependent => :destroy
   has_one :subtitle, :class_name => "I18nVariable", :as => :language_value, :autosave => true, :dependent => :destroy
   has_one :text, :class_name => "I18nVariable", :as => :language_value, :autosave => true, :dependent => :destroy
-  has_and_belongs_to_many :tags
+  has_and_belongs_to_many :tags, :class_name => "ModuleAppTag"
 
   field :postdate , :type => Date
   field :deadline , :type => Date

vendor/built_in_modules/announcement/app/models/module_app_tag.rb

@@ -0,0 +1,5 @@
+class ModuleAppTag < Tag
+  
+  has_and_belongs_to_many :bulletins
+  
+end