When trying to upgrade Tumbleweed to the latest snapshot, zypper fails because
the package python310-requests-gssapi-1.2.3-7.9 is not found in the repository.
After checking, I have indeed seen that the repository only contains
python310-requests-gssapi-1.2.3-7.10:

http://download.opensuse.org/repositories/devel:/languages:/python/openSUSE_Factory_zSystems/noarch/

I have tried to bypass this issue by manually installing
python310-requests-gssapi-1.2.3-7.10 to satisfy the dependency before launching
the upgrade, but python310-requests-gssapi depends on python310-gssapi and
apparently python310-gssapi is the culprit requiring
python310-requests-gssapi-1.2.3-7.9.

Right now, this problem makes it impossible for a normal non-power user (like
me) to upgrade to the latest version of Tumbleweed.