How to seperate different plugins with the same name

I'm writing the installation code of my modulair web application and I stumbled on writing the update code for the plugins.

The problem I am having is: how do you know if the plugin is already installed? Developers can give their plugin a very basic name like: "News". There will probably be more plugins with that name and now the system think it's the same plugin and will overwrite it.

What can I provide to the plugin to make it unique when installing and knowing it's a update when a user provides a new installation package?

The idea is that there is only an installation service, not an install and update. The system should be able to know if it's a new installation or a update.