Hello, I am renting an apartment here in Dubai for...

Please note that my answer to your question will be purely from an academic point of view based on the limited initial information provided.

Therefore, it should not be treated as a legal opinion of the need for adequate knowledge and review of relevant documents when reading the applicable laws.

The landlord cannot pre-order the total rental value for a year,
To resolve the rental disputes between the landlord and the tenant, contact the concerned authority in the emirate where the rental property is located:

Dubai Rental Disputes Center - Land and Property Department

In the event that the intended question is otherwise, you can kindly ask us in detail and we will respond to it in the shortest time frame.