I run the Data Domain Virtual Edition integrated with Veeam using Boost. My DD-VE was originally deployed as 188.8.131.52, later upgraded to 184.108.40.206, and then 220.127.116.11 which is where it's currently. I'm trying to upgrade and have downloaded the various DDOS RPMs from 18.104.22.168 to 22.214.171.124. With two different ones (including 126.96.36.199) when I do the upgrade precheck it fails with "Registry validation failed" and a note to contact support for help. Since this is the free version of DD-VE I'm not sure if I can open a ticket so I thought I'd post here. The only thing I've found online is references to the registry on the DD if CIFS is enabled. While I use Boost, at one point I enabled CIFS to do a test so I've gone ahead and disabled it and disabled AD authentication completely but that hasn't fixed anything.
Call support - try are always willing to help. just says it a trail and you need help upgrading. This is usually caused by duplicate entries in the backend DB. It requires support to find and clear the issue.