How to create new 'logicalID' localy?

Hey, I have git integration with one workspace. 

The folder structure is simple. Its one report and one semantic model: 

Reports.Report

Reports.Dataset

I just copy passed the Reports.Report so now the folder look like:

Reports.Report

Reports_Coppy.Report

Reports.Dataset

After the commit in the power bi, I received an error:

"Duplicate logicalIDs
This action can't be completed because the following items have duplicate logicalIDs."

So I just changed the:

`logicalId` in `./Reports_Coppy.Report/item.config.json` (I just randomly change one character in string)

`displayName` `./Reports_Coppy.Report/item.metadata.json`. 

It works, but I am not sure if I am free to set `logicalId` to any string I like, or is there a strict way to do this?

Also, is there something else I should be aware of when I copy/pase the entire [name].Report folder? How to do it properly?

Thanks