"GUID Partition Table Header signature is wrong:" Virhe vai ei?

[intikka]

Tämmöistä tuli, kun päivitin

Tehdään asetuksia: grub2-common (2.02~beta2-36ubuntu3.7) ...
Tehdään asetuksia: grub-efi-amd64-bin (2.02~beta2-36ubuntu3.7) ...
Tehdään asetuksia: grub-efi-amd64 (2.02~beta2-36ubuntu3.7) ...
Installing for x86_64-efi platform.
GUID Partition Table Header signature is wrong: be5608740128e852 != 5452415020494645
GUID Partition Table Header signature is wrong: 0 != 5452415020494645
GUID Partition Table Header signature is wrong: be5608740128e852 != 5452415020494645
GUID Partition Table Header signature is wrong: 0 != 5452415020494645
GUID Partition Table Header signature is wrong: be5608740128e852 != 5452415020494645
GUID Partition Table Header signature is wrong: 0 != 5452415020494645
Asennus on päättynyt. Virheitä ei löytynyt.
Generating grub configuration file ...
Linux-levykuva löytyi: /boot/vmlinuz-4.4.0-59-generic
Löytyi initrd-levykuva: /boot/initrd.img-4.4.0-59-generic
Linux-levykuva löytyi: /boot/vmlinuz-4.4.0-57-generic
Löytyi initrd-levykuva: /boot/initrd.img-4.4.0-57-generic
Adding boot menu entry for EFI firmware configuration
valmis
Tehdään asetuksia: grub-efi-amd64-signed (1.66.7+2.02~beta2-36ubuntu3.7) ...
Installing for x86_64-efi platform.
GUID Partition Table Header signature is wrong: be5608740128e852 != 5452415020494645
GUID Partition Table Header signature is wrong: 0 != 5452415020494645
GUID Partition Table Header signature is wrong: be5608740128e852 != 5452415020494645
GUID Partition Table Header signature is wrong: 0 != 5452415020494645
GUID Partition Table Header signature is wrong: be5608740128e852 != 5452415020494645
GUID Partition Table Header signature is wrong: 0 != 5452415020494645
Asennus on päättynyt. Virheitä ei löytynyt.


Siis onko virheitä vai ei? Mitäs nyt tehdään?