npm install node-horseman return error

[GilTads]

When I run the command I have the following error:

npm ERR! Linux 4.10.0-38-generic
npm ERR! argv "/usr/bin/node" "/usr/bin/npm" "install" "node-horseman" "--save"
npm ERR! node v6.12.0
npm ERR! npm v3.10.10
npm ERR! code ENOSELF

npm ERR! Refusing to install node-horseman as a dependency of itself
npm ERR!
npm ERR! If you need help, you may report this error at:
npm ERR! https://github.com/npm/npm/issues

Will it be a problem with my Linux?
Thanks in advance.