I think this is the script you’re referring to? You will still need to copy and paste the tasks themselves into the new child records (or use an automation or scripting to do that for you), but they will be linked to the new project, not the old one.

Does the linked field in your tasks table - the one that links to your projects - allow for linking to multiple fields?

When I tired running the script it gave me this: "Linked record field must be of type linked record to parent table." I tired a similar automation needs a single field to be copied.

I currently have each task to be set/labeled a single select that has each type of task listed. In my case it's called "Task Name", with each selection being things like; Music, Edit, Sound, ETC. I seem to only be able to add the "Task Name" field once, but if I could add multiple that would possibly solve it?

I'm new to airtable so apologizes in advanced.

Also, just to add onto that, I'm mostly looking to be using the tasks as a way to build on a schedule using the gantt view. All of our projects will have the same tasks for the schedule.