In case you have locked a package (e.g. 'perl') and you install another package
(e.g. 'nut') with dependency of 'perl' then you get this warning-message which
need some rephrasing, especially first line:

"
Problem: the to be installed nut-2.7.4-150000.6.3.1.x86_64 requires 'usbutils',
but this requirement cannot be provided
  not installable providers: usbutils-014-3.3.1.x86_64[openSUSE-Leap-15.4-1]
                   usbutils-014-3.3.1.x86_64[repo-oss]
 Solution 1: remove lock to allow installation of
perl-5.26.1-150300.17.3.1.x86_64[repo-sle-update]
 Solution 2: remove lock to allow installation of
perl-5.26.1-150300.17.11.1.x86_64[repo-sle-update]
 Solution 3: remove lock to allow installation of
perl-5.26.1-150300.17.3.1.x86_64[repo-oss]
 Solution 4: remove lock to allow installation of
perl-5.26.1-150300.17.3.1.x86_64[openSUSE-Leap-15.4-1]
 Solution 5: do not install nut-2.7.4-150000.6.3.1.x86_64
 Solution 6: break nut-2.7.4-150000.6.3.1.x86_64 by ignoring some of its
dependencies

Choose from above solutions by number or cancel [1/2/3/4/5/6/c/d/?] (c):
"

Absolutely not critical, but should be fixed next time you come around these
code-lines anyway ;-)