System fails to boot and/or LUKS encrypted devices fail to unlock if a duplicate entry exists in the /etc/crypttab file

Issue

• Systemd Cryptsetup-Generator stops processing all /etc/crypttab entries if a duplicate entry is encountered, or a systemd cryptsetup unit file already exists. This will prevent any encrypted devices after the duplicate entry from being unlocked, and can result in the system booting to emergency mode if the device is also listed in /etc/fstab.