Corporate Rental issue


I have taken warehouse in Bangalore for rental and the space is 2000 sqft ground floor. Agreement we made in 07.07.2017. Which is valid for 24 months But now building owner is presurising us to buy first floor space also which is around 2000 sqft.( which floor was vacant from the last one year as per owner) now another client has approached to owner for the both floor, thats building owner is presirising us to buy first floor or else to vacate the warehouse, we have full of goods in the warehouse worth of 8 truck goods…please advice us what to do with