```ruby
class SandboxShipmentSerializer < ActiveModel::Serializer
  attributes :id, :appendix, :taxon_name, #:reported_taxon_name, :accepted_taxon_name,
    :term_code, :quantity, :unit_code, :trading_partner, :country_of_origin,
    :export_permit, :origin_permit, :purpose_code, :source_code,
    :year, :import_permit, :versions, :changes

#  def reported_taxon_name
#    object.reported_taxon_concept && "#{object.reported_taxon_concept.full_name} (#{object.reported_taxon_concept.name_status})" ||
#    object.taxon_name
#  end
#
#  def accepted_taxon_name
#    object.taxon_concept && "#{object.taxon_concept.full_name} (#{object.taxon_concept.name_status})"
#  end
  #
  def versions
    object.versions.map(&:reify)
  end

  def changes
    object.versions.map(&:changeset)
  end

end

```

Remove updated_at from the list of changes
user
```ruby
class SandboxShipmentSerializer < ActiveModel::Serializer
  attributes :id, :appendix, :taxon_name, #:reported_taxon_name, :accepted_taxon_name,
    :term_code, :quantity, :unit_code, :trading_partner, :country_of_origin,
    :export_permit, :origin_permit, :purpose_code, :source_code,
    :year, :import_permit, :versions, :changes

#  def reported_taxon_name
#    object.reported_taxon_concept && "#{object.reported_taxon_concept.full_name} (#{object.reported_taxon_concept.name_status})" ||
#    object.taxon_name
#  end
#
#  def accepted_taxon_name
#    object.taxon_concept && "#{object.taxon_concept.full_name} (#{object.taxon_concept.name_status})"
#  end
  #
  def versions
    object.versions.map(&:reify)
  end

  def changes
    object.versions.map(&:changeset).each do |changes|
      changes.delete("updated_at")
    end
  end

end

```
assistant