Comment # 2 on bug 1090524 from Duncan Mac-Vicar

You are right:

# ls /dev/disk/by-id/scsi-SATA_Samsung_SSD_840S1AXNSAF418336R
ls: cannot access '/dev/disk/by-id/scsi-SATA_Samsung_SSD_840S1AXNSAF418336R':
No such file or directory

/etc # ag Samsung_SSD
default/grub_installdevice
1:/dev/disk/by-id/scsi-SATA_Samsung_SSD_840S1AXNSAF418336R

default/grub_installdevice.old
1:/dev/disk/by-id/scsi-SATA_Samsung_SSD_840_S1AXNSAF418336R
/etc #

How did that value end in default/grub_installdevice?

What should I do, just remove those two files? (they are not owned by any
package).