I had some reports that: sudo rm -rf /lib/partman/automatically_partition/15reuse/ /lib/partman/automatically_partition/25replace/
Helps (do it before clicking continue on the prepare page)
I had some reports that: automatically_ partition/ 15reuse/ /lib/partman/ automatically_ partition/ 25replace/
sudo rm -rf /lib/partman/
Helps (do it before clicking continue on the prepare page)