I ran into the problem in the past of needing to restore a Clonezilla partition image and the partition numbers had been changed. When trying to restore it fails and throws an error msg.
You will need to do this as Root:
1. Navigate to the folder of your Clonezilla backup image. Copy the folder to somewhere else (any other directory will do) and rename the copy to whatever.old
2. Open the original image folder (as root) and rename the files ending with the extensions gz.aa, gz.ab, etc. changing only the partition number in the name. (Example: sda5.ext4-ptcl-img.gz.aa is changed to sda7.ext4-ptcl-img.gz.aa).
3. Open the file named parts with gedit or kate and rename the single drive number in that folder and save the file (example: sda5 is changed to sda7).
Now if you run Clonezilla, as long as the target partition is the same size or larger than the original partition that you cloned your image from, it should restore to the new partition even though the partition number is not the same as the one the image was cloned from.