Representing Landlord - Tenant selling business. Language for new lease

[Eileen Baston]

I represent Landlord in shopping center with multiple tenants.  Barbershop tenant is selling his business to another barbershop. Landlord has approved.  I will draft new lease.  However, current Tenant has one year left on his lease to be assumed by new tenant. Assignment is in place.  Do I treat this like an entirely new lease with new tenant? Do I include language in new Lease or is this just covered in the Assignment and include the Assignment as an exhibit...Do I just work off the original lease with original Barbershop tenant.  This is is new to me.  Thank you for any guidance.