Deleted Host attempting to reenroll duplicate MAC

[astrugatch]

I have a couple hosts that I deleted via the fog GUI (1.5.9.98) and when I go to reenroll them they are complaining that the MAC is already in use. Any way to completely purge these?

[astrugatch]

When I run :

SELECT * FROM hostMAC WHERE hmMAC LIKE '%aa:bb:cc:dd:ee:ff%';
SELECT * FROM hosts WHERE hostID IN (SELECT hmHostID FROM hostMAC WHERE hmMAC LIKE '%aa:bb:cc:dd:ee:ff%');

I get output pertaining to the host that I had deleted via the GUI. Is there a way to delete those records from the DB using the MAC?