Warning: Constant DB_NAME already defined in wp-config.php

Hi and thanks for the plugin!

I noticed that it produces some error when running any WP–CLI command. I get 20 lines like this

Warning: Constant DB_NAME already defined in … wp-config.php on line 14
Warning: Constant DB_USER already defined in … wp-config.php on line 15
Warning: Constant DB_PASSWORD already defined in … wp-config.php on line 16
Warning: Constant DB_HOST already defined in … wp-config.php on line 17
Warning: Constant DB_CHARSET already defined in … wp-config.php on line 18

when I deactivate the plugin, everything is working.

Any ideas? There are no duplicates in wp-config.php.

Thank you!