grub-efi-amd64-signed grub-efi-arm64-signed unmet dependencies:

Beschreibung:

The following packages have unmet dependencies:  
shim-signed : Depends: grub-efi-amd64-signed (>= 1.191~) but 1.187.6+2.06-2ubuntu14.4 is to be installed or                         
grub-efi-arm64-signed (>= 1.191~) but it is not installable or                         
base-files (< 12.3)

 

Lösung:

sudo apt --only-upgrade install grub-efi-amd64-signed