Both `yarn.lock` and `package-lock.json` are present in frontend.

[Laikulo]

This leads to both yarn complaining about the conflict

warning package-lock.json found. Your project contains lock files generated by tools other than Yarn. It is advised not to mix package managers in order to avoid resolution inconsistencies caused by unsynchronized lock files. To clear this warning, remove package-lock.json.

and contributor confusion about which should be used.

Since the yarn.lock is newer, I am assuming that is the true lockfile

[kennethjiang]

Good point! thank you! @Laikulo