diff --git a/db/migrate/20180518113526_remove_repository_rows_and_columns_without_repository.rb b/db/migrate/20180518113526_remove_repository_rows_and_columns_without_repository.rb
deleted file mode 100644
index 69adf5698..000000000
--- a/db/migrate/20180518113526_remove_repository_rows_and_columns_without_repository.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-class RemoveRepositoryRowsAndColumnsWithoutRepository < ActiveRecord::Migration[5.1]
-  def up
-    if column_exists?(:repositories, :discarded_at)
-      repository_ids = Repository.select(:id)
-      RepositoryRow.where.not(repository_id: repository_ids).delete_all
-      RepositoryColumn.where.not(repository_id: repository_ids).delete_all
-    end
-  end
-end
diff --git a/lib/tasks/clear_repository_rows_and_columns_without_repository.rake b/lib/tasks/clear_repository_rows_and_columns_without_repository.rake
index c2076a898..d1909b210 100644
--- a/lib/tasks/clear_repository_rows_and_columns_without_repository.rake
+++ b/lib/tasks/clear_repository_rows_and_columns_without_repository.rake
@@ -3,7 +3,7 @@ namespace :clear_repository_rows_and_columns_without_repository do
        'referenced entities with dependent: destroy'
   task run: :environment do
     repository_ids = Repository.select(:id)
-    RepositoryRow.where.not(repository_id: repository_ids).delete_all
-    RepositoryColumn.where.not(repository_id: repository_ids).delete_all
+    RepositoryRow.where.not(repository_id: repository_ids).destroy_all
+    RepositoryColumn.where.not(repository_id: repository_ids).destroy_all
   end
 end