rubygems - Rails: How can I remove default version of bundler?

Question

I tried to change default bundle version but it getting updated with 2 default version. How can I modify to single default?

$ gem list bundler

*** LOCAL GEMS ***

bundler (2.0.1, default: 1.16.6, default: 1.16.2)

If I do gem uninstall not removing defaults,

$ gem uninstall bundler
Successfully uninstalled bundler-2.0.1


$ gem list bundle

*** LOCAL GEMS ***

bundler (default: 1.16.6, default: 1.16.2)

How can I set (like the below) default as single version?

bundler (2.0.1, default: 1.16.6)

Answer 1

I had the same problem but with a newer version

$ gem list bundler

*** LOCAL GEMS ***

bundler (default: 2.1.4, default: 2.1.2)

But after following indications on this post Two default versions of rake installed - how to delete one allowed me to deleted one.

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You have to delete the .gemspec file corresponding to the default gem you want to delete.

So first, locate where those files are.

# I'm running RVM to manage my Ruby versions

~/.rvm/rubies/ruby-2.7.0/lib/ruby/gems/2.7.0/specifications/default/

-rw-r--r--   1 myuser  staff  10731 Dec 26 17:22 bundler-2.1.2.gemspec
-rw-r--r--   1 myuser  staff  15134 Jan  7 17:30 bundler-2.1.4.gemspec

Delete the one you don't need.

$ rm ~/.rvm/rubies/ruby-2.7.0/lib/ruby/gems/2.7.0/specifications/default/bundler-2.1.2.gemspec

Then install (or reinstall) the gem you want to set as default.

$ gem install bundler:2.1.4 --default

Successfully installed bundler-2.1.4 as a default gem

Finally you'll have installed only the version you wanted.

$ gem list bundler

*** LOCAL GEMS ***

bundler (default: 2.1.4)