In 6.1.26-145957, there is no binary file "/usr/lib/virtualbox/vboxwebsrv"

I don't know why...
root@Intel-10510U:~# dpkg-deb -c virtualbox-6.1_6.1.24-145767~Ubuntu~eoan_amd64.deb | grep vboxwebsrv
-rwxr-xr-x root/root 29589608 2021-07-16 15:39 ./usr/lib/virtualbox/vboxwebsrv
lrwxrwxrwx root/root 0 2021-07-16 15:39 ./usr/bin/vboxwebsrv -> VBox
root@Intel-10510U:~# dpkg-deb -c virtualbox-6.1_6.1.26-145957~Ubuntu~eoan_amd64.deb | grep vboxwebsrv
lrwxrwxrwx root/root 0 2021-07-28 20:14 ./usr/bin/vboxwebsrv -> VBox
root@Intel-10510U:~# dpkg-deb -c virtualbox-6.1_6.1.24-145767~Ubuntu~eoan_amd64.deb | grep vboxwebsrv
-rwxr-xr-x root/root 29589608 2021-07-16 15:39 ./usr/lib/virtualbox/vboxwebsrv
lrwxrwxrwx root/root 0 2021-07-16 15:39 ./usr/bin/vboxwebsrv -> VBox
root@Intel-10510U:~# dpkg-deb -c virtualbox-6.1_6.1.26-145957~Ubuntu~eoan_amd64.deb | grep vboxwebsrv
lrwxrwxrwx root/root 0 2021-07-28 20:14 ./usr/bin/vboxwebsrv -> VBox