The description of the distribution upgrade contains a documentation issue.
SDB:Distribution-Upgrade
Under point “2. Update the repos” is in the German version a grep
“grep baseurl /etc/zypp/repos.d/*.repo | grep releasever” with the comment that if no $releasever is found, the sed command should be executed.
It is not relevant if there are some entries with $releasever found, you should always execute the sed, becuase you need to update the entries necessary, but not shown in the grep- list.