How to fix Yarn packages are out of date in terminal

Question

I am always after being installed yarn.

=> Booting Puma
=> Rails 6.0.0.rc2 application starting in development 
=> Run `rails server --help` for more startup options
Usage: yarn [options]

yarn: error: no such option: --integrity


========================================
  Your Yarn packages are out of date!
  Please run `yarn install --check-files` to update.
========================================


To disable this check, please change `check_yarn_integrity`
to `false` in your webpacker config file (config/webpacker.yml).

Answer 1

Check your yarn version using yarn --version. If the version is less than 1.21.1 Update using curl --compressed -o- -L https://yarnpkg.com/install.sh | bash. The run yarn install on projects root

Answer 2

Try:

• Updating node and yarn
• Deleting node_modules directory and running yarn install again