Existing lease on new property has no term!

[Janet Orgill]

I am purchasing a two-unit property that has one current tenant. The lease began February 15th of this year, but for some reason the landlord did not put in a term. It is not an annual term, it is not month to month, that section of the lease is blank. The property is in the state of Utah. Can anyone guide me as to how to handle this?  The current rents are about 20% below market, so I'd like them out. I close on 11/21/18. Thanks!