#317

backend/app/controllers/tags_controller.rb

@@ -302,10 +302,9 @@ class TagsController < ApplicationController
       NicoTagVersionRecorder.record!(tag:, event_type:, created_by_user:)
     else
       TagVersionRecorder.record!(tag:, event_type:, created_by_user:)
-      if tag.has_wiki
-        WikiVersionRecorder.record!(page: tag.tag_name.wiki_page,
-                                    event_type: :update,
-                                    created_by_user:)
+      wiki_page = tag.tag_name.wiki_page
+      if wiki_page&.wiki_versions&.exists?
+        WikiVersionRecorder.record!(page: wiki_page, event_type: :update, created_by_user:)
       end
     end
   end