apt-get autoremove says dkms: WARNING: Linux headers are missing, which may explain the above failures.

ubuntu 18.04

first I issue

sudo apt-get dist-upgrade

The following packages were automatically installed and are no longer required:
  linux-headers-4.15.0-10 linux-headers-4.15.0-10-generic linux-image-4.15.0-10-generic linux-image-extra-4.15.0-10-generic linux-signed-image-4.15.0-10-generic
Use 'sudo apt autoremove' to remove them.

OK so then I issue

sudo apt-get autoremove

Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
  linux-headers-4.15.0-10 linux-headers-4.15.0-10-generic linux-image-4.15.0-10-generic linux-image-extra-4.15.0-10-generic linux-signed-image-4.15.0-10-generic
0 upgraded, 0 newly installed, 5 to remove and 0 not upgraded.
After this operation, 334 MB disk space will be freed.
Do you want to continue? [Y/n]
(Reading database ... 280528 files and directories currently installed.)
Removing linux-headers-4.15.0-10-generic (4.15.0-10.11) ...
Removing linux-headers-4.15.0-10 (4.15.0-10.11) ...
Removing linux-signed-image-4.15.0-10-generic (4.15.0-10.11) ...
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-4.15.0-15-generic
Found initrd image: /boot/initrd.img-4.15.0-15-generic
Found linux image: /boot/vmlinuz-4.15.0-13-generic
Found initrd image: /boot/initrd.img-4.15.0-13-generic
Found linux image: /boot/vmlinuz-4.15.0-10-generic
Found initrd image: /boot/initrd.img-4.15.0-10-generic
Found Windows Boot Manager on /dev/sda1@/EFI/Microsoft/Boot/bootmgfw.efi
Adding boot menu entry for EFI firmware configuration
done
Removing linux-image-extra-4.15.0-10-generic (4.15.0-10.11) ...
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 4.15.0-10-generic /boot/vmlinuz-4.15.0-10-generic
run-parts: executing /etc/kernel/postinst.d/dkms 4.15.0-10-generic /boot/vmlinuz-4.15.0-10-generic
dkms: WARNING: Linux headers are missing, which may explain the above failures.
      please install the linux-headers-4.15.0-10-generic package to fix this.
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 4.15.0-10-generic /boot/vmlinuz-4.15.0-10-generic
update-initramfs: Generating /boot/initrd.img-4.15.0-10-generic
run-parts: executing /etc/kernel/postinst.d/unattended-upgrades 4.15.0-10-generic /boot/vmlinuz-4.15.0-10-generic
run-parts: executing /etc/kernel/postinst.d/update-notifier 4.15.0-10-generic /boot/vmlinuz-4.15.0-10-generic
run-parts: executing /etc/kernel/postinst.d/zz-update-grub 4.15.0-10-generic /boot/vmlinuz-4.15.0-10-generic
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-4.15.0-15-generic
Found initrd image: /boot/initrd.img-4.15.0-15-generic
Found linux image: /boot/vmlinuz-4.15.0-13-generic
Found initrd image: /boot/initrd.img-4.15.0-13-generic
Found linux image: /boot/vmlinuz-4.15.0-10-generic
Found initrd image: /boot/initrd.img-4.15.0-10-generic
Found Windows Boot Manager on /dev/sda1@/EFI/Microsoft/Boot/bootmgfw.efi
Adding boot menu entry for EFI firmware configuration
done
Removing linux-image-4.15.0-10-generic (4.15.0-10.11) ...
Examining /etc/kernel/prerm.d.
run-parts: executing /etc/kernel/prerm.d/dkms 4.15.0-10-generic /boot/vmlinuz-4.15.0-10-generic
Examining /etc/kernel/postrm.d .
run-parts: executing /etc/kernel/postrm.d/initramfs-tools 4.15.0-10-generic /boot/vmlinuz-4.15.0-10-generic
update-initramfs: Deleting /boot/initrd.img-4.15.0-10-generic
run-parts: executing /etc/kernel/postrm.d/zz-update-grub 4.15.0-10-generic /boot/vmlinuz-4.15.0-10-generic
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-4.15.0-15-generic
Found initrd image: /boot/initrd.img-4.15.0-15-generic
Found linux image: /boot/vmlinuz-4.15.0-13-generic
Found initrd image: /boot/initrd.img-4.15.0-13-generic
Found Windows Boot Manager on /dev/sda1@/EFI/Microsoft/Boot/bootmgfw.efi
Adding boot menu entry for EFI firmware configuration
done

system fails to realize I am auto removing header package so it outputs :

dkms: WARNING: Linux headers are missing, which may explain the above failures.
      please install the linux-headers-4.15.0-10-generic package to fix this.

That message to me indicates some logic bug ... system is OK so why that message ?