Deploystack error

Hi there,

I have the following repeat error, please can you help:

Welcome to Cloud Shell! Type "help" to get started.
Your Cloud Platform project in this session is set to studiosupply.
Use “gcloud config set project [PROJECT_ID]” to change to a different project.
admin_@cloudshell:~ (studiosupply)$ git clone https://github.com/googlecloudplatform/deploystack-nosql-client-server
fatal: destination path 'deploystack-nosql-client-server' already exists and is not an empty directory.
admin_@cloudshell:~ (studiosupply)$ cd deploystack-nosql-client-server && deploystack install

Deploystack
Stack has been chosen
Installation will proceed with this stack:
/home/admin_/deploystack-nosql-client-server/deploystack-nosql-client-server
: not a directory

Deploystack - Error
An error occurred collecting the necessary information to run your Deploystack
application. Please try again.