Solved - Pihole FTL DB is huge taking too much disk space

If, like me, you’ve also run out of room on your pi-hole running on a raspberry pi, here’s how you can clean up the database (note: all of the logged data will disappear forever!)

cd /etc/pihole
sudo service pihole-FTL stop
sudo mv pihole-FTL.db pihole-FTL.db.old
sudo service pihole-FTL start