```ruby
class WhitehallAssetsController < BaseAssetsController
  def create
    if existing_asset_with_this_legacy_url_path.exists?
      existing_asset_with_this_legacy_url_path.destroy!
    end

    super
  end

private

  def asset_params
    base_asset_params.permit(
      :file,
      :draft,
      :redirect_url,
      :replacement_id,
      :legacy_url_path,
      :legacy_etag,
      :legacy_last_modified,
      :parent_document_url,
      access_limited: [],
      access_limited_organisation_ids: [],
    )
  end

  def existing_asset_with_this_legacy_url_path
    WhitehallAsset.where(legacy_url_path: asset_params[:legacy_url_path])
  end

  def find_asset(include_deleted: false)
    scope = include_deleted ? WhitehallAsset : WhitehallAsset.undeleted
    scope.from_params(
      path: params[:path], format: params[:format],
    )
  end

  def build_asset
    WhitehallAsset.new(asset_params)
  end
end
```

Fix buggy auto-correct for Rails/SaveBang
user
```ruby
class WhitehallAssetsController < BaseAssetsController
  def create
    if existing_asset_with_this_legacy_url_path.exists?
      existing_asset_with_this_legacy_url_path.destroy_all
    end

    super
  end

private

  def asset_params
    base_asset_params.permit(
      :file,
      :draft,
      :redirect_url,
      :replacement_id,
      :legacy_url_path,
      :legacy_etag,
      :legacy_last_modified,
      :parent_document_url,
      access_limited: [],
      access_limited_organisation_ids: [],
    )
  end

  def existing_asset_with_this_legacy_url_path
    WhitehallAsset.where(legacy_url_path: asset_params[:legacy_url_path])
  end

  def find_asset(include_deleted: false)
    scope = include_deleted ? WhitehallAsset : WhitehallAsset.undeleted
    scope.from_params(
      path: params[:path], format: params[:format],
    )
  end

  def build_asset
    WhitehallAsset.new(asset_params)
  end
end
```
assistant