Bootstrap being loaded twice?

On the theme's configuration form disable library load

Yes thanks for clarifying.

If I understand correctly I can do this from both the parent and child themes, then gulp is usually used to compile everything that is installed in the child theme.

Alternatively, I think I could probably disable compiling any libraries with gulp and then simply compile any required components and add any overrides that I require in my child theme while inheriting from the precompiled version in the libraries folder which I think that is more in line with how Bootstrap 3 works

Certainly I am of a fan of using composer installers extender to manage my js dependencies and one benefit of that approach is it makes it easy to update bootstrap version along with everything else.

I guess I am really wondering what was the main reasoning behind this alternative approach which seems a little unintuitive based on my limited experience of working with other Drupal themes and how they inherit from one another.

ok I think I see one issue is that when compiling any sass it bario_bootstrap parent it requires the bootstrap variables and mixins first.

Removing libraries installation and will just use the child theme for managing bootstrap version.

Thanks