Hi @ybaskar-temp_3339 ,
Thanks for confirming that.
I think it'd be worth exploring how to change those migration/environment constraints. While it's unfortunate to "lose history" and need to navigate to a separate instance, there's a moderate amount of risk in things simply not working the way it did before.... we're talking a decade of evolution, including platform, architectural, and even usage changes.
That said, for an in-place upgrade, here's the approach that I would use.
Use the Legacy (Traditional) installer to get to BuildMaster 6.1.
Verify things work as expected on BuildMaster 6.1, agents updated, etc
Upgrade to BuildMaster 6.2, again using the traditional installer
Verify things work as expected in same manner
Uninstall
Ensure all components (iis site, service, program files.... except database, artifacts) have been removed
Install BuildMaster 2025 as per normal, pointing to existing database
Note that there's a decent change that you'll run into database or binding errors after #7, so make sure to run buildmaster.service.exe run from the commandline to better see messages and errors if things don't start up.
Cheers,
Steve