In Rails 6.0.1 old attachments get overwritten

[quantavi]

After you add some attachments, the next time you do attaching, old attachments will be purged from the system.
This is due to a fact that the behaviour of Rails changed from version 5.2. It used to append attachments. You can control this in the Rails by setting the following config flag in config/environments/development.rb, production.rb and test.rb:
config.active_storage.replace_on_assign_to_many = false

Just adding this for consideration.

[joao-guerra]

Thank you, saved my life!