"autoadmin generate" must be renamed to "autoadmin-generate"

drush outputs the following error and stops working:

$ drush module_name generate table_name
Notice: "autoadmin generate" must be renamed to "autoadmin-generate" in order [error] to work with this version of drush. If you are the maintainer for the module that defines this command, please rename it immediately. If you are a user of this command, you may enable spaces in commands for a while by setting "allow-spaces-in-commands" in your drush configuration file. See example.drushrc.php.