Autoload error

Module 'Blackbird_ContentManager' from '/var/www/share/motea.com/release/0879ad2a3a03f8728c2634045346ab9f5e64accb/app/code/Blackbird/ContentManager' has been already defined in '/var/www/share/motea.com/release/0879ad2a3a03f8728c2634045346ab9f5e64accb/app/code/Blackbird/ContentManager_new'.