Cleanse Pattern is on page 168 of the new edition of Mage the Awakening and says:
With this spell, a mage removes the tell-tale signs of Awakened interference.
But it's primary spell factor is potency which had no mention in the rest is the spell's text.
It would seem useless to only last a turn (which I think is the unaltered duration), instead of being lasting. A lasting spell wouldn't need to have a duration spell factor. Thus my assumption.
So which is it: lasting or using duration as the primary spell factor?