Drush misidentifies my D7 site as drupal 8
I'm using Drush Commandline Tool 9.2.1 in a Drupal 7


Drush 9 only works with Drupal 8.4+ 

As seen on: http://docs.drush.org/en/master/install/ 



Uninstall Drush 9

composer global remove drush/drush


and install Drush 8

composer global require drush/drush:8.x