"dnf copr 활성화@spacewalkproject/spacewalk-2.10-client" 추가 오류

Fedora 31 서버 중 하나에 spacewalk 클라이언트를 설치하려고 하면 이 오류가 발생합니다.

# dnf copr enable @spacewalkproject/spacewalk-2.10-client
Enabling a Copr repository. Please note that this repository is not part of the main distribution, and quality may vary.

The Fedora Project does not exercise any power over the contents of this repository beyond the rules outlined in the Copr FAQ at <https://docs.pagure.org/copr.copr/user_documentation.html#what-i-can-build-in-copr>, and packages are not held to any quality or security level. 
Please do not file bug reports about these packages in Fedora Bugzilla. In case of problems, contact the owner of this repository.

Do you really want to enable copr.fedorainfracloud.org/@spacewalkproject/spacewalk-2.10-client? [y/N]: y
Error: This repository does not have any builds yet so you cannot enable it now.

서버 A에 설치할 수 있었던 것으로 기억하는데, 서버 B에서 동일한 작업을 시도하면 이 오류가 발생합니다. 차이점이 무엇인지 잘 모르겠습니다.

Server A $ cat /etc/os-release .
NAME=Fedora
VERSION="31 (Server Edition)"
ID=fedora
VERSION_ID=31
VERSION_CODENAME=""
PLATFORM_ID="platform:f31"
PRETTY_NAME="Fedora 31 (Server Edition)"
ANSI_COLOR="0;34"
LOGO=fedora-logo-icon
CPE_NAME="cpe:/o:fedoraproject:fedora:31"
HOME_URL="https://fedoraproject.org/"
DOCUMENTATION_URL="https://docs.fedoraproject.org/en-US/fedora/f31/system-administrators-guide/"
SUPPORT_URL="https://fedoraproject.org/wiki/Communicating_and_getting_help"
BUG_REPORT_URL="https://bugzilla.redhat.com/"
REDHAT_BUGZILLA_PRODUCT="Fedora"
REDHAT_BUGZILLA_PRODUCT_VERSION=31
REDHAT_SUPPORT_PRODUCT="Fedora"
REDHAT_SUPPORT_PRODUCT_VERSION=31
PRIVACY_POLICY_URL="https://fedoraproject.org/wiki/Legal:PrivacyPolicy"
VARIANT="Server Edition"
VARIANT_ID=server

Server B# cat /etc/os-release
NAME=Fedora
VERSION="31 (Server Edition)"
ID=fedora
VERSION_ID=31
VERSION_CODENAME=""
PLATFORM_ID="platform:f31"
PRETTY_NAME="Fedora 31 (Server Edition)"
ANSI_COLOR="0;34"
LOGO=fedora-logo-icon
CPE_NAME="cpe:/o:fedoraproject:fedora:31"
HOME_URL="https://fedoraproject.org/"
DOCUMENTATION_URL="https://docs.fedoraproject.org/en-US/fedora/f31/system-administrators-guide/"
SUPPORT_URL="https://fedoraproject.org/wiki/Communicating_and_getting_help"
BUG_REPORT_URL="https://bugzilla.redhat.com/"
REDHAT_BUGZILLA_PRODUCT="Fedora"
REDHAT_BUGZILLA_PRODUCT_VERSION=31
REDHAT_SUPPORT_PRODUCT="Fedora"
REDHAT_SUPPORT_PRODUCT_VERSION=31
PRIVACY_POLICY_URL="https://fedoraproject.org/wiki/Legal:PrivacyPolicy"
VARIANT="Server Edition"
VARIANT_ID=server

이것은 제가 이전에 설치할 수 있었던 시스템 중 하나입니다.

# rhn_register --version
 rhn_register (Spacewalk Client Tools) 2.10.10-1.fc31
 Copyright (C) 1999--2014 Red Hat, Inc.
 Licensed under the terms of the GPLv2.

# cat /etc/redhat-release
 Fedora release 31 (Thirty One)