SPO for DSO and Cube

Hi,

I have read many Docs regarding Semantic Partitions.

so i have knowledge whats happening in SPO.

But my doubt is earlier they have created semantic partition for DSO and Cube for fiscal year from 2008 to 2015.

Now i need to add from 2016 to 2019.Going to work in Production Directly.

So suggest whether i can add partition in the existing one

Kindly please help me with step by step process.