How to have an existing project # to pull in updated/modified project template

Summary

Team members have an existing project # and have updated/modified a project template. Looking for a way to have the updated project template associated with the project #

Content

Hello, thank you for your help in advance,

I have some team members who have an existing project # and have updated/modified a project template. They are looking for a way to have the updated project template associated with the project # (without creating a brand new project #). 

I'm still learning the Projects module and would appreciate any guidance you can provide, 

Thanks!

Matt

Version

20D