Error I'm seeing in my logs, need help identifying

Hi - I see this error over and over in my logs, and am not sure what to do since the path is to the wp-admin/includes/ folder. Here is the error:

PHP Warning: unlink(/tmp/3469944b9f59411d173d0a1cfae462a6.tmp): No such file or directory in /var/www/sites/nameofmysite/wp-admin/includes/class-wp-filesystem-ftpext.php on line 148

Any ideas? Since it's the Wordpress core and I'm up to date, I'm not sure what to do to get rid of it. Thanks.