WordPress Theme Updates Question

I’d like to know what WordPress pulls to notify updates from the code.

I’m currently facing an issue where my theme happens to have the same name as another theme which is already in the repository and it’s notifying me that I’m currently using an older version of the theme. What’s even worse, my theme gets replaced with that already existing theme when I click update.

So it’ll be great if I could just change a code or two to prevent this. I’ve tried changing the ‘Theme Name’ in style.css in the root folder (do I have to wait for this to update?) but it’s not working.

Note: I’m using my theme in MAMP (connected to the internet, of course).

Does anyone know how to solve this?

Thanks