CRM 365 - Project Service Automation Demo Data - Multiple Instances

Hey guys and girls,

i have a question about my small Office365 CRM (online)-Setup.

I am using two instances of CRM - one "productive", one "sandbox".

The "productive"-instance has already a few data in it and the sandbox is still emtpy. Both have the Project Service Automation App enabled.

Now i want to install some Project Service Automation demo-data into the sandbox and there is a package for that from Microsoft.

https://www.microsoft.com/en-us/dynamics/crm-customer-center/use-demo-data-project-service-automation.aspx

I found some PackageDeployer-Youtube-Videos and i haven't seen an option to choose the CRM-instance for the data deployment.

Now i am a bit afraid, that the Project Service Automation demo-data installer (PackageDeployer) will simply override my "productive"-data, instead of importing everything into my sandbox.

Do you people know something about this?

Thank in advance :-)