False detection of root partition. about encrypt-cloud-image HOT 1 OPEN

I have a disk with seperate root and var partition both get same partuuid, I installed ubuntu server from iso
root@ubuntu1804:/mnt/repos/myclone/encrypt-cloud-image# lsblk -n -J -o type,fstype,uuid,parttype /dev/nbd0p2
{
   "blockdevices": [
      {"type": "part", "fstype": "ext4", "uuid": "dd446044-2a18-4e42-9551-9f52b2f96fde", "parttype": "0fc63daf-8483-4772-8e79-3d69d8477de4"}
   ]
}
root@ubuntu1804:/mnt/repos/myclone/encrypt-cloud-image# lsblk -n -J -o type,fstype,uuid,parttype /dev/nbd0p3
{
   "blockdevices": [
      {"type": "part", "fstype": "ext4", "uuid": "ce6ce620-1841-40e3-b01c-7b0ba412e282", "parttype": "0fc63daf-8483-4772-8e79-3d69d8477de4"}
   ]
}

from encrypt-cloud-image.