Hi @pawel905090

Did you select the droplet in the control panel, click the Destroy menu, and select “Debian 9.1” as image, and clicked Rebuild?
If yes, then yes, it will completely destroy the old droplet and delete everything, and replace it with the new image.

Which repositories do you see? Check your apt sources located here:

/etc/apt/

I already created new droplet so problem fixed, thanks anyway