#434

backend/app/models/post_version.rb

@@ -3,7 +3,8 @@ class PostVersion < ApplicationRecord
 
   scope :with_previous_version, -> {
     joins('LEFT JOIN post_versions prev ON prev.post_id = post_versions.post_id ' +
-          'AND prev.version_no = post_versions.version_no - 1')
+          'AND prev.version_no = post_versions.version_no - 1 AND ' +
+          HistoryAccess.sql(PostVersion, 'prev'))
   }
 
   belongs_to :post