centos7.8升级openEuler22.03-lts 回退失败

在执行回退重启时,系统卡住一直处于重启状态,执行强制重启后系统进入救援模式,在救援模式中将一台正常系统的/etc/os-release拷贝到待升级机器后系统恢复,但系统并未回退完成,yum和rpm无法使用,哪位大佬遇到过类似的问题呢?或者是否可以将系统再次进行回退呢?
yum报错:
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:

/usr/lib64/librpm.so.3: undefined symbol: rpm_execcon

Please install a package which provides this module, or
verify that the module is installed correctly.

It’s possible that the above module doesn’t match the
current version of Python, which is:
2.7.5 (default, Aug 4 2017, 00:39:18)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-16)]

If you cannot solve this problem yourself, please go to
the yum faq at:
http://yum.baseurl.org/wiki/Faq

rpm报错:
rpm:/usr/lib64/liblzma.so.5: version ‘XZ_5.2’ not found (required by /usr/lib64/librpmio.so.9)