error Your lockfile needs to be updated, but yarn was run with `--frozen-lockfile`

error Your lockfile.md

error Your lockfile needs to be updated, but yarn was run with `--frozen-lockfile`.

if you update your package.json only. and then run yarn install --frozen-lockfile

The above error show you on console.

it's say that you need to run just yarn install.

--fronzen-lockfile option is tell you need to update your lock.file which will be much dependency of package in your package.json.

It's possible to occure in server when you deploy. if there are your changed package.json that pushing to git repogitory already in server , But you forget to change yarn.lockfile and have not been git it, run above command (--forzen-lockfile). you notice that your forgot it.

I had a problem deploying a backend app in railway and I solved doing two things:

• Removing the ^ from the dependencies
• Deleting the yarn.lock file, since it was generated on the build process and therefore, this error didn't appeared anymore

It worked, Thanks!