When I open the boot menu of my motherboard(x570 aorus elite). I get to see my nvme SSd(Samsung SSD 970 EVO 1TB) and the windows bootmanager is correct. But I also see third option for Ubuntu on the same SSD. I don't understand stand where the third option is coming from and how to delete it. If I try to boot from it it says the device is not bootable.
Picture enter image description here