#419

backend/app/models/post.rb

@@ -92,7 +92,7 @@ class Post < ApplicationRecord
            inverse_of: :parent_post
   has_many :children, through: :child_post_implications, source: :post
 
-  has_many :post_external_tags, dependent: :delete_all
+  has_many :post_external_tags, dependent: :destroy
   has_many :external_tags, through: :post_external_tags
 
   has_one_attached :thumbnail