Problem

• During system upgrade, when reusing some of the old repositories with new URLs YaST still used the old packages.
• https://bugzilla.suse.com/show_bug.cgi?id=1215884

This is the dialog which allows reusing the old reposiotories, possibly with a new URL. The YaST repository was switched to reuse with the new SP5 URL:

That actually works fine, but when the user goes back in the workflow and then forth then this dialog was skipped and the old repository was reused with the old URL. That could cause some dependency issues.

After going back and forth you can see the old SP4 URL and the old 4.4.x package version in the details:

Solution

It turned out that the previously used repositories were not dropped early enough so the selection dialog was skipped and the old repository was used.

Testing

• Tested manually in
  • DVD medium based (offline) upgrade to SLE-15-SP5
  • SCC (online) upgrade to SLE-15-SP5
  • Medium based upgrade to Leap 15.5
• Going back and forth was fixed in SLE, but the problem remains in Leap. On the other hand it was completely broken there even without going back, now it at least works without going back so it is still better than it was. Fixing Leap is not trivial and I do not want to waste time here...

With the fix you can see the new SP5 URL and correct 4.5.x package version even after going back and forth: