Comment # 1 on bug 1039193 from Stefan Hundhammer

From the y2log:

2017-05-15 18:21:15 <1> install(3812) [Ruby] clients/update_proposal.rb:539
Update compatibility: Update.ProductsCompatible: true,
Update.products_incompatible: false, update_not_possible: true


>From macro_inst_initial.ycp:

    {
        //
        // 2017-05-15 18:21:13

        UI::ChangeWidget( `id ("filter_text"),    `Value,    "" );    //
YInputField ""
        UI::ChangeWidget( `id ("addon_repos"),    `CurrentItem,   
"(http://download.opensuse.org/update/tumbleweed/|/)" );    //
YMultiSelectionBox "Liste der Repositories"
        UI::ChangeWidget( `id ("addon_repos"),    `SelectedItems,   
["(http://download.opensuse.org/update/tumbleweed/|/)",
"(http://download.opensuse.org/tumbleweed/repo/oss/|/)",
"(http://download.opensuse.org/tumbleweed/repo/non-oss/|/)",
"(http://download.opensuse.org/source/tumbleweed/repo/oss/|/)",
"(http://download.opensuse.org/debug/tumbleweed/repo/oss/|/)"] );    //
YMultiSelectionBox "Liste der Repositories"

        // UI::MakeScreenShot( "/tmp/yast2-0014" );
        UI::FakeUserInput( `next );

        return;
    }


So to me this looks as if it simply checks if an update is possible with
compatible products (which says "true" - see above) and with checking the
version number - which of course is the same; you came from Tumbleweed, and you
want to upgrade to Tumbleweed.

The officially supported upgrade paths are described here:

  https://en.opensuse.org/openSUSE:Tumbleweed_upgrade

Unfortunately, it does not specify anything about *which* Tumbleweed ISO to use
to start the upgrade from. I am not sure if using the same one you installed
the old version with is supported; we'll have to check that.

But anyway, booting from that ISO would not really improve anything over a
simple "zypper dup" in the shell since you are basically using the same kernel
(or even an older one) to boot from and to upgrade with as the kernel you
already have installed.

We recommend booting from the ISO you want to upgrade to because that ISO might
come with a newer and better kernel, base utilities and YaST; but that is not
true in your case. It's all the same you already have (in the best case), or
typically (due to regular Tumbleweed package updates) even older versions.