I have a question about a lease.

[Rylee Knox]

Hey bigger pockets community, my parents are preparing to move into a new apartment in Portland, Maine and they were asked to agree to some terms on the lease that are a little concerning. They are selling their home to move into this apartment. Everything is moving smoothly, but obviously moving into the apartment is contingent on the sale of the home. 

The lease states that "If home sale falls through - rent for the entirety of the lease will still be due, unless another tenant can be found (by you) and agreed upon (by landlord)."

What do you think about this clause. Is this a common thing? What should my parents do? Thank you in advance for helping with this.