代码拉取完成，页面将自动刷新
降级前sp3版本：tog-pegasus-help-2:2.14.1-51.oe1.noarch
降级后sp2版本：tog-pegasus-help-2:2.14.1-50.oe1.noarch
环境：sp2环境
验证步骤：
1、只挂sp3源：
http://121.36.84.172/dailybuild/openEuler-20.03-LTS-SP3/test_openeuler-2021-11-25-06-31-07/everything/
安装sp3的包
2、回退：
开启sp2的源：
https://repo.openeuler.org/openEuler-20.03-LTS-SP2/everything/
https://repo.openeuler.org/openEuler-20.03-LTS-SP2/OS/
执行dnf downgrade降级
报错现象：
Downgrading : tog-pegasus-help-2:2.14.1-50.oe1.noarch 1234/2857
warning: group pegasus does not exist - using root
warning: group pegasus does not exist - using root
warning: group pegasus does not exist - using root
warning: group pegasus does not exist - using root
warning: group pegasus does not exist - using root
warning: group pegasus does not exist - using root
warning: group pegasus does not exist - using root
warning: group pegasus does not exist - using root
warning: group pegasus does not exist - using root
warning: group pegasus does not exist - using root
warning: group pegasus does not exist - using root
warning: group pegasus does not exist - using root
warning: group pegasus does not exist - using root
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问题分析：
tog-pegasus安装时报问题现象中问题已经在2.14.1-51版本修复，现在降级安装，从2.14.1-51降级到2.14.1-50，相当于将修复的问题回退，此时就会重新出现问题。
问题结论：
安装出现告警的问题已经在2.14.1-51版本修复。
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