Flushing the ARP cache to remove stale entries - Network Overview

Help
10

I was succesfull in deleting a single MAC with below one:

echo 'DELETE FROM network WHERE hwaddr LIKE "50:46:5d:6c:XX:XX";' | sudo -u pihole sqlite3 /etc/pihole/pihole-FTL.db

I imagine this to do no harm or do I miss something ?