PCG graph does not give the same output.

I am very sorry for the basic question.
This is my first time using PCG graphs with UE5.

I am trying to create a forest using PCG graphs. I was able to create the result I wanted (1st image), so I placed this graph again in the same Landscape.
However, I find that the density of grass and trees in the output has changed significantly from the first one. (2nd image)

What is the problem with this?
Please help me;(

Thanks.