This bug's title is misleading. The BIOS Boot Partition is required (or at least recommended), as the partition's name suggests, on *BIOS-based* systems. On UEFI-based systems, this partition is NOT required.
The bug reported seems to be that a proper installation of grub-efi (GRUB for EFI/UEFI systems) is being replaced by an improper installation of grub-pc (GRUB for BIOS systems) when GRUB is updated. Since grub-pc tries to install to a BIOS Boot Partition on GPT disks, it generates the reported error message, but that message is misleading.
This bug's title is misleading. The BIOS Boot Partition is required (or at least recommended), as the partition's name suggests, on *BIOS-based* systems. On UEFI-based systems, this partition is NOT required.
The bug reported seems to be that a proper installation of grub-efi (GRUB for EFI/UEFI systems) is being replaced by an improper installation of grub-pc (GRUB for BIOS systems) when GRUB is updated. Since grub-pc tries to install to a BIOS Boot Partition on GPT disks, it generates the reported error message, but that message is misleading.