Hi my Solution
1. Start your System if the blue Grub screen apperars press e
2. search for a /sdX string and edit it to /sda1
3. after a proper boot Login with your admin account
4. Edit the grub.ini
Code
sudo nano /boot/grub/grub.cfg
search foi nearly the same string from "2." and edit it the same way. Safe the file and exit
5. update the bootloader
Code
sudo grub-update
reboot6. That's it worked for me
a short check after a reboot shows a UUID at the point the /sdx were