root user no permission to delete a tmp file [closed]

I have installed VirtualBox vm ubuntu20.04, and create a tmp file.

After I reinstalled vm ubunto22.04, I want to delete that file (disk is shared from win10, so reinstall vm but file still there).

# ls -lah  .#drawer.org -rwxrwx--- 1 root vboxsf 30 Mar  7 11:52 .#drawer.org# sudo rm .#drawer.org rm: cannot remove '.#drawer.org': Operation not permitted

How can I delete such files after reinstalled OS?