Termination of a tenancy contract before its due date by a tenant

Hello,

I'm the landlord of a flat in Dubai. I have rent out it to a tenant from 01/08/2019 to 31/07/2020.

The tenant has paid all with 2 checks. On 05, February, he told me that he wants to early terminate the contract and leave the flat on 05, April. In our addendum, it is written that:

18. In the event of termination of contract prior to the mentioned date of expiry, the tenant will have to inform the landlord with a 60 days prior written notice and indemnify the landlord with an amount equivalent of 2-month rent.

I understand that for sure he has to pay normal rent until 05, April and after that, he has to indemnify me with an amount like 2 months of penalty.

He understands that he has not to pay a penalty. Only stay until 5, April and leave.

What do you think about this?

In my opinion, "indemnify" means that he has to pay a penalty for my loss (the flat is empty, etc).