at the bottom, why does zypper  marks a package "obsolete"  even with higher  version number ...
true:  "epson-inkjet-printer-escpr-1.8.0-1.x86_64¨ is installed manually (downloaded package)
how does zypper deal with package version numbers?? 

verwijs-leap:~ # zypper dup

Repository 'Insync Fedora 27' is up to date.
Retrieving repository '.NET/Mono based Software (openSUSE_Tumbleweed)' metadata ...................................[done]
Building repository '.NET/Mono based Software (openSUSE_Tumbleweed)' cache ........................................[done]
Repository 'MySQL 8.0 Community Server' is up to date.
Repository 'MySQL 8.0 Community Server Debug' is up to date.
Repository 'MySQL Connectors Community' is up to date.
Repository 'MySQL Connectors Community Debug' is up to date.
Repository 'MySQL Tools Community' is up to date.
Repository 'MySQL Tools Community Debug' is up to date.
Repository 'MySQL Tools Community preview' is up to date.
Retrieving repository 'The Mono Project (openSUSE_Factory)' metadata ..............................................[done]
Building repository 'The Mono Project (openSUSE_Factory)' cache ...................................................[done]
Repository 'nVidia Graphics Drivers Tumbleweed' is up to date.
Repository 'MariaDB 11.2 (sles 12)' is up to date.
Repository 'MariaDB 11.2 (sles 15)' is up to date.
Repository 'openSUSE-Leap-15.6-1' is up to date.
Repository 'repo-non-oss (15.6)' is up to date.
Repository 'repo-openh264 (15.6)' is up to date.
Repository 'repo-oss (15.6)' is up to date.
Repository 'update-backports (15.6)' is up to date.
Repository 'update-backports-debug (15.6)' is up to date.
Repository 'update-non-oss (15.6)' is up to date.
Repository 'update-oss (15.6)' is up to date.
Repository 'update-sle (15.6)' is up to date.
Repository 'update-sle-debug (15.6)' is up to date.
Repository 'packages-microsoft-com-prod' is up to date.
Repository 'Update repository with updates for openSUSE Leap debuginfo packages from openSUSE Backports' is up to date.
Repository 'Update repository of openSUSE Backports' is up to date.
Repository 'Update repository with debuginfo for updates from SUSE Linux Enterprise 15' is up to date.
Repository 'Update repository with updates from SUSE Linux Enterprise 15' is up to date.
All repositories have been refreshed.
Refreshing service 'openSUSE'.
Loading repository data...
Warning: Repository 'update-backports (15.6)' metadata expired since 2023-09-29 11:08:32 CEST.
Warning: Repository 'update-backports-debug (15.6)' metadata expired since 2023-09-29 11:08:33 CEST.
Warning: Repository 'update-non-oss (15.6)' metadata expired since 2023-09-21 14:47:58 CEST.
Warning: Repository 'Update repository with updates for openSUSE Leap debuginfo packages from openSUSE Backports' metadata expired since 2023-09-29 11:08:33 CEST.
Warning: Repository 'Update repository of openSUSE Backports' metadata expired since 2023-09-29 11:08:32 CEST.

Warning: Repository metadata expired: Check if 'autorefresh' is turned on (zypper lr), otherwise
manualy refresh the repository (zypper ref). If this does not solve the issue, it could be that
you are using a broken mirror or the server has actually discontinued to support the repository.

Reading installed packages...
Warning: You are about to do a distribution upgrade with all enabled repositories. Make sure these repositories are compatible before you continue.
See 'man zypper' for more information about this command.
Computing distribution upgrade...

Problem: problem with the installed epson-inkjet-printer-escpr-1.8.0-1.x86_64
Solution 1: install epson-inkjet-printer-escpr-1.7.22-bp156.2.2.x86_64 from vendor openSUSE
replacing epson-inkjet-printer-escpr-1.8.0-1.x86_64 from vendor Seiko Epson Corporation
Solution 2: keep obsolete epson-inkjet-printer-escpr-1.8.0-1.x86_64

Choose from above solutions by number or cancel [1/2/c/d/?] (c):