I ran a Lubuntu groovy install (not the current daily, it's a few days old so won't be found on iso.qa.ubuntu.com on same d755-8 box) and selected
replace partition (sda5)
and it completed without issue.
I ran a Lubuntu groovy install (not the current daily, it's a few days old so won't be found on iso.qa.ubuntu.com on same d755-8 box) and selected
replace partition (sda5)
and it completed without issue.