My application tries replace another my application

My application tries r开发者_JS百科eplace another my application.

I add aplication on git https://github.com/szalek/AndroidLevel1.

When I install the application 'Vinyl' and next install the application 'TeamLeader1/'. I see message 'The application you are installing will replace another application. All previous user data will be saved'

This is because both applications have the same package name. If the package name of the two applications are different, you won't get this message.

In fact, if the package name in the Manifest file (in the <manifest> tag) matches the package name of another installed application, it will replace it.