Procedure for cancellation of a registered lease

You have to again registered the cancellation deed in registrar office

through the same parties.. Means both parties are required for cancellation as well...

Radda Patra in Marathi.

What is the effect or implication of a lease deed not specifically cancelled in the Registrar’s Office

To be more specific let me explain with an  example

A lease deed contains lock in period of 2 years which stipulates that the rent would be payable for the lock in period even if the premises are vacated in the lock in period

The tenant vacates the premises in the lock in period. On demanding the rent for the lock in period the tenant says that the lease gets terminated automatically on vacation of the premises

Is the stand of the tenant legally correct?

Does the lease stands applicable unless cancelled in the Registrar’s office ?

Even if the lease deed expires, is the tenant not under obligation to fulfill the conditions of the lease?