Does the new owner need to serve eviction notice to the tenant if the old owner served it?

Hi,

I just bought a villa in Dubai, wherein the previous owner had served an eviction notice in Aug. to the tenant with the reason that he intends to sell the property.

Based on this eviction notice, I bought the property, and now I was told that I need to serve a new eviction notice to the tenant again as a new owner.

If I do this, then the tenant will get 12 months to vacate from the new notice date. Then what is the use of the old eviction notice?

As I understand the new owner will need to honor all obligations of the old landlord and in which case the new landlord should also be entitled to the right of eviction notice served by the old landlord, right?

Kindly clarify