ROI don't initialize

[Ley-lele]

The roi region will accumulation everytime when i edit the mask. the region i editted before dont change even when i choose another mask.
Here r some pic bellow. I wonder how i can initialize the roi when i try new edit to the mask

first edit and the visual of generated roi

second edit and the visual of generated roi

as u can see, the first one track still on the second one even i didn't draw it