WPMU DASHBOARD CANT ACTIVATE- FATAL ERROR MESSAGE

Hello,

Thanks for your response!
So, I uploaded the dashboard to my site successfully. However, I received this message:
Fatal error: Cannot redeclare class WPMUDEV_Dashboard in /home/gupppyco/public_html/wp-content/plugins/wpmudev-updates/update-notifications.php on line 40

I'm not quite sure what that means but hopefully its a simple fix.
Could you know what that means?

Thanks