info No lockfile found. error Running this command will add the dependency to the workspace root rather than the workspace itself, which might not be what you want - if you really meant it, make it explicit by running this command again with the -W flag (or --ignore-workspace-root-check). info Visit https://yarnpkg.com/en/docs/cli/add for documentation about this command.

오류 해결 방법
yarn add react@17.0.2 -W
or
yarn add react@17.0.2 --ignore-workspace-root-check

tag: none

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