Renewing a rental agreement while it is agreed not to get renewed

Hi,

I have a question regarding a rental agreement.

We are the landlord and one of our properties is rented. So before the contract was signed, we agreed with the tenant and put it in writing that this would be the last year of rent, and there would be no renewal once rent expires.

This condition is in the contract. The tenant agreed and signed. Now the tenant doesn't want to follow the agreement and is forcing us to renew for another year.

What can we do about it?