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Heroku : npm ERR! code EEXIST

resource
https://stackoverflow.com/questions/46541371/npm-err-refusing-to-delete-code-eexist

log messeges

npm ERR! Refusing to delete /tmp/build_1d08d29a9c9a463668992db197c02ec0/client/node_modules/.bin/jest: ../jest-cli/bin/jest.js symlink target is not controlled by npm

solution :
since Heroku could not delete the file which was not supposed to be existing,
delete the node_modules and run heroku again

andnnndd you maayyy want to delete package-lock json as well..

and heroku will be installing node modules when running.....

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