Drush command terminated abnormally I'm using https://github.com/drupal-composer/drupal-project and get an error when starting drush:

[~/public_html/drupal]# alias drush="~/.composer/vendor/bin/drush"
[~/public_html/drupal]# drush
[error]  Drush command terminated abnormally due to an unrecoverable error.
 Error: Cannot declare class Drush\Commands\DrushCommands, because the name is already in use in /home/myuser/.composer/vendor/drush/drush/src/Commands/DrushCommands.php, line 12 


What am I missing oder messing up?
I had to use another drush location. With the one in [~/public_html/drupal/vendor/drush/drush] everything seems to work.