I can't use bootable usb

I am currently using Prime OS on my laptop. I have installed it on my harddisk without any other OS. Now I am planning to migrate to Manjaro XFCE but my bootable usb doesn’t work. Everytime I boot on my usb to install manjaro, it goes back to the prime os grub menu. Any Ideas on how can I remove prime OS and replace it with manjaro?

You probably you have to check your boot device in the firmware and change it to the Manjaro USB stick.

Also, it would be helpful if you provide some info about your system:

use ventoy for your USB iso