How to create packages to share with other machines

Hello everyone,
I’m trying to create a package to share with other machines. However, when creating the package, it asks for a module reference. I’m providing the module reference of the module I’ve already worked on, but it’s showing an error saying it already exists. How can I create this package and use it on another system?

Thank You.

Please check this: Clarification on Module Def and Packages - #2 by NCP