我们有一台 i686 架构的 Centos 6.10 机器。服务器正在运行旧软件，需要某些软件包的特定版本。
自 2016 年以来，我们第一次不得不重新启动计算机，并意识到 2020 年执行的更新破坏了该服务器上运行的旧软件的启动程序。
因此，我们目前正在尝试执行一项yum history undo在 2020 年更改了 200 多个软件包的交易，这应该会让我们回到这个旧软件的可行确认状态。
这是yum history输出：
ID | Login user | Date and time | Action(s) | Altered
-------------------------------------------------------------
35 | redacted | 2023-04-07 10:09 | Erase | 14
34 | redacted | 2023-04-07 10:08 | Erase | 1
33 | redacted | 2023-04-07 10:08 | Erase | 2
32 | redacted | 2020-09-25 13:11 | Install | 2
31 | redacted | 2020-09-22 11:19 | Install | 1
30 | redacted | 2020-06-29 14:49 | Install | 14
29 | redacted | 2020-04-30 20:17 | E, I, U | 203 E<
28 | redacted | 2014-09-26 07:58 | Update | 1 >
如您所见，我们已经撤消了事务 32、31 和 30。我们现在正尝试执行 29，这是一个更大的更新。不幸的是，一旦完成所有依赖关系解析，我们就会收到以下信息。
Error: Trying to remove "yum", which is protected
由于这是已执行事务的逆转，我认为 yum 实际上只是被降级，而不是删除，但依赖项解析尚未解决这个问题。
我的另一个担心是，考虑到这是一个试图回滚的大型更新，是否有可能引入进一步的问题，或者 yum 在回滚大型事务方面是否相当可靠。
如果有这方面经验的人可以提供帮助，那将不胜感激。我已包含yum transaction info以下完整内容：
Packages Altered:
Loading mirror speeds from cached hostfile
* epel: d2lzkl7pfhq30w.cloudfront.net
Updated acl-2.2.49-6.el6.i686
Update 2.2.49-7.el6_9.1.i686
Updated audit-2.2-2.el6.i686
Update 2.4.5-6.el6.i686
Updated audit-libs-2.2-2.el6.i686
Update 2.4.5-6.el6.i686
Updated authconfig-6.1.12-13.el6.i686
Update 6.1.12-23.el6.i686
Updated bash-4.1.2-15.el6_5.2.i686
Update 4.1.2-48.el6.i686
Updated bfa-firmware-3.0.3.1-1.el6.noarch
Update 3.2.23.0-2.el6.noarch
Updated binutils-2.20.51.0.2-5.36.el6.i686
Update 2.20.51.0.2-5.48.el6_10.1.i686
Updated ca-certificates-2010.63-3.el6_1.5.noarch
Update 2019.2.32-65.1.el6_10.noarch
Updated centos-release-6-4.el6.centos.10.i686
Update 6-10.el6.centos.12.3.i686
Updated chkconfig-1.3.49.3-2.el6_4.1.i686
Update 1.3.49.5-1.el6.i686
Updated cifs-utils-4.8.1-18.el6.i686
Update 4.8.1-20.el6.i686
Updated coreutils-8.4-19.el6_4.2.i686
Update 8.4-47.el6.i686
Updated coreutils-libs-8.4-19.el6_4.2.i686
Update 8.4-47.el6.i686
Updated cpio-2.10-11.el6_3.i686
Update 2.10-13.el6.i686
Updated cpp-4.4.7-3.el6.i686
Update 4.4.7-23.el6.i686
Updated cryptsetup-luks-1.2.0-7.el6.i686
Update 1.2.0-11.el6.i686
Updated cryptsetup-luks-libs-1.2.0-7.el6.i686
Update 1.2.0-11.el6.i686
Updated curl-7.19.7-37.el6_4.i686
Update 7.19.7-54.el6_10.i686
Updated cyrus-sasl-2.1.23-13.el6_3.1.i686
Update 2.1.23-15.el6_6.2.i686
Updated cyrus-sasl-devel-2.1.23-13.el6_3.1.i686
Update 2.1.23-15.el6_6.2.i686
Updated cyrus-sasl-lib-2.1.23-13.el6_3.1.i686
Update 2.1.23-15.el6_6.2.i686
Updated db4-4.7.25-18.el6_4.i686
Update 4.7.25-22.el6.i686
Updated db4-utils-4.7.25-18.el6_4.i686
Update 4.7.25-22.el6.i686
Updated dbus-libs-1:1.2.24-7.el6_3.i686
Update 1:1.2.24-11.el6_10.i686
Updated device-mapper-1.02.77-9.el6_4.3.i686
Update 1.02.117-12.el6_9.1.i686
Updated device-mapper-event-1.02.77-9.el6_4.3.i686
Update 1.02.117-12.el6_9.1.i686
Updated device-mapper-event-libs-1.02.77-9.el6_4.3.i686
Update 1.02.117-12.el6_9.1.i686
Updated device-mapper-libs-1.02.77-9.el6_4.3.i686
Update 1.02.117-12.el6_9.1.i686
Updated device-mapper-multipath-0.4.9-64.el6_4.2.i686
Update 0.4.9-106.el6_10.1.i686
Updated device-mapper-multipath-libs-0.4.9-64.el6_4.2.i686
Update 0.4.9-106.el6_10.1.i686
Updated device-mapper-persistent-data-0.1.4-1.el6.i686
Update 0.6.2-0.2.rc7.el6.i686
Updated dhclient-12:4.1.1-34.P1.el6_4.1.i686
Update 12:4.1.1-63.P1.el6.centos.i686
Updated dhcp-common-12:4.1.1-34.P1.el6_4.1.i686
Update 12:4.1.1-63.P1.el6.centos.i686
Updated dracut-004-303.el6.noarch
Update 004-411.el6.noarch
Updated dracut-kernel-004-303.el6.noarch
Update 004-411.el6.noarch
Updated dracut-network-004-303.el6.noarch
Update 004-411.el6.noarch
Updated e2fsprogs-1.41.12-14.el6_4.4.i686
Update 1.41.12-24.el6.i686
Updated e2fsprogs-libs-1.41.12-14.el6_4.4.i686
Update 1.41.12-24.el6.i686
Updated efibootmgr-0.5.4-10.el6.i686
Update 0.5.4-15.el6.i686
Updated elfutils-libelf-0.152-1.el6.i686
Update 0.164-2.el6.i686
Updated ethtool-2:3.5-1.el6.i686
Update 2:3.5-6.el6.i686
Updated expat-2.0.1-11.el6_2.i686
Update 2.0.1-13.el6_8.i686
Updated fcoe-utils-1.0.24-2.el6.i686
Update 1.0.28-6.el6.i686
Updated file-5.04-15.el6.i686
Update 5.04-30.el6.i686
Updated file-libs-5.04-15.el6.i686
Update 5.04-30.el6.i686
Updated findutils-1:4.4.2-6.el6.i686
Update 1:4.4.2-9.el6.i686
Updated gawk-3.1.7-10.el6.i686
Update 3.1.7-10.el6_7.3.i686
Updated gcc-4.4.7-3.el6.i686
Update 4.4.7-23.el6.i686
Updated gcc-c++-4.4.7-3.el6.i686
Update 4.4.7-23.el6.i686
Updated gdbm-1.8.0-36.el6.i686
Update 1.8.0-39.el6.i686
Updated glib2-2.22.5-7.el6.i686
Update 2.28.8-10.el6.i686
Updated glibc-2.12-1.107.el6_4.5.i686
Update 2.12-1.212.el6_10.3.i686
Updated glibc-common-2.12-1.107.el6_4.5.i686
Update 2.12-1.212.el6_10.3.i686
Updated glibc-devel-2.12-1.107.el6_4.5.i686
Update 2.12-1.212.el6_10.3.i686
Updated glibc-headers-2.12-1.107.el6_4.5.i686
Update 2.12-1.212.el6_10.3.i686
Updated gmp-4.3.1-7.el6_2.2.i686
Update 4.3.1-13.el6.i686
Updated gnupg2-2.0.14-6.el6_4.i686
Update 2.0.14-9.el6_10.i686
Updated grep-2.6.3-3.el6.i686
Update 2.20-6.el6.i686
Updated grub-1:0.97-81.el6.i686
Update 1:0.97-99.el6.i686
Updated grubby-7.0.15-3.el6.i686
Update 7.0.15-7.el6.i686
Updated gzip-1.3.12-19.el6_4.i686
Update 1.3.12-24.el6.i686
Updated hwdata-0.233-7.9.el6.noarch
Update 0.233-20.1.el6.noarch
Updated initscripts-9.03.38-1.el6.centos.2.i686
Update 9.03.61-1.el6.centos.i686
Updated iproute-2.6.32-23.el6.i686
Update 2.6.32-57.el6.i686
Updated iptables-1.4.7-9.el6.i686
Update 1.4.7-19.el6.i686
Updated iptables-ipv6-1.4.7-9.el6.i686
Update 1.4.7-19.el6.i686
Updated iputils-20071127-17.el6_4.2.i686
Update 20071127-24.el6.i686
Updated iscsi-initiator-utils-6.2.0.873-2.el6.i686
Update 6.2.0.873-27.el6_9.i686
Erase kernel-2.6.32-220.7.1.el6.i686
Install kernel-2.6.32-754.29.1.el6.i686
Erase kernel-devel-2.6.32-220.7.1.el6.i686
Install kernel-devel-2.6.32-754.29.1.el6.i686
Updated kernel-firmware-2.6.32-358.23.2.el6.noarch
Update 2.6.32-754.29.1.el6.noarch
Updated kernel-headers-2.6.32-358.23.2.el6.i686
Update 2.6.32-754.29.1.el6.i686
Updated keyutils-1.4-4.el6.i686
Update 1.4-5.el6.i686
Updated keyutils-libs-1.4-4.el6.i686
Update 1.4-5.el6.i686
Updated kpartx-0.4.9-64.el6_4.2.i686
Update 0.4.9-106.el6_10.1.i686
Updated krb5-libs-1.10.3-10.el6_4.6.i686
Update 1.10.3-65.el6.i686
Updated less-436-10.el6.i686
Update 436-13.el6.i686
Updated libacl-2.2.49-6.el6.i686
Update 2.2.49-7.el6_9.1.i686
Updated libblkid-2.17.2-12.9.el6_4.3.i686
Update 2.17.2-12.28.el6_9.2.i686
Updated libcgroup-0.37-7.2.el6_4.i686
Update 0.40.rc1-27.el6_10.i686
Updated libcom_err-1.41.12-14.el6_4.4.i686
Update 1.41.12-24.el6.i686
Updated libcurl-7.19.7-37.el6_4.i686
Update 7.19.7-54.el6_10.i686
Updated libdrm-2.4.39-1.el6.i686
Update 2.4.65-2.el6.i686
Updated libgcc-4.4.7-3.el6.i686
Update 4.4.7-23.el6.i686
Updated libgcrypt-1.4.5-11.el6_4.i686
Update 1.4.5-12.el6_8.i686
Updated libgomp-4.4.7-3.el6.i686
Update 4.4.7-23.el6.i686
Updated libhbaapi-2.2.6-1.el6.i686
Update 2.2.9-2.el6.i686
Updated libhbalinux-1.0.14-1.el6.i686
Update 1.0.17-2.el6.i686
Updated libnih-1.0.1-7.el6.i686
Update 1.0.1-8.el6.i686
Updated libnl-1.1.4-1.el6_4.i686
Update 1.1.4-2.el6.i686
Dep-Install libnl3-3.2.21-8.el6.i686
Updated libpciaccess-0.13.1-2.el6.i686
Update 0.13.4-1.el6.i686
Updated libselinux-2.0.94-5.3.el6_4.1.i686
Update 2.0.94-7.el6.i686
Updated libselinux-utils-2.0.94-5.3.el6_4.1.i686
Update 2.0.94-7.el6.i686
Updated libsemanage-2.0.43-4.2.el6.i686
Update 2.0.43-5.1.el6.i686
Updated libss-1.41.12-14.el6_4.4.i686
Update 1.41.12-24.el6.i686
Updated libssh2-1.4.2-1.el6.i686
Update 1.4.2-3.el6_10.1.i686
Updated libstdc++-4.4.7-3.el6.i686
Update 4.4.7-23.el6.i686
Updated libstdc++-devel-4.4.7-3.el6.i686
Update 4.4.7-23.el6.i686
Updated libtalloc-2.0.7-2.el6.i686
Update 2.1.5-1.el6_7.i686
Dep-Install libtasn1-2.3-6.el6_5.i686
Updated libtdb-1.2.10-1.el6.i686
Update 1.3.8-3.el6_8.2.i686
Dep-Install libtevent-0.9.26-2.el6_7.i686
Updated libtirpc-0.2.1-6.el6_4.i686
Update 0.2.1-15.el6.i686
Updated libudev-147-2.46.el6.i686
Update 147-2.74.el6_10.i686
Updated libuser-0.56.13-5.el6.i686
Update 0.56.13-8.el6_7.i686
Updated libuuid-2.17.2-12.9.el6_4.3.i686
Update 2.17.2-12.28.el6_9.2.i686
Updated libxml2-2.7.6-12.el6_4.1.i686
Update 2.7.6-21.el6_8.1.i686
Updated lldpad-0.9.45-7.el6.i686
Update 0.9.46-10.el6_8.i686
Updated lldpad-libs-0.9.45-7.el6.i686
Update 0.9.46-10.el6_8.i686
Updated logrotate-3.7.8-16.el6.i686
Update 3.7.8-28.el6.i686
Updated logwatch-7.3.6-49.el6.noarch
Update 7.3.6-55.el6.noarch
Updated lvm2-2.02.98-9.el6_4.3.i686
Update 2.02.143-12.el6_9.1.i686
Updated lvm2-libs-2.02.98-9.el6_4.3.i686
Update 2.02.143-12.el6_9.1.i686
Updated mailx-12.4-6.el6.i686
Update 12.4-10.el6_10.i686
Updated make-1:3.81-20.el6.i686
Update 1:3.81-23.el6.i686
Updated mlocate-0.22.2-4.el6.i686
Update 0.22.2-6.el6.i686
Updated module-init-tools-3.9-21.el6_4.i686
Update 3.9-26.el6.i686
Updated ncurses-5.7-3.20090208.el6.i686
Update 5.7-4.20090207.el6.i686
Updated ncurses-base-5.7-3.20090208.el6.i686
Update 5.7-4.20090207.el6.i686
Updated ncurses-libs-5.7-3.20090208.el6.i686
Update 5.7-4.20090207.el6.i686
Updated net-tools-1.60-110.el6_2.i686
Update 1.60-114.el6.i686
Updated newt-0.52.11-3.el6.i686
Update 0.52.11-4.el6.i686
Updated newt-python-0.52.11-3.el6.i686
Update 0.52.11-4.el6.i686
Updated nfs-utils-1:1.2.3-36.el6.i686
Update 1:1.2.3-78.el6_10.2.i686
Updated nfs-utils-lib-1.1.5-6.el6.i686
Update 1.1.5-13.el6.i686
Updated nscd-2.12-1.107.el6_4.5.i686
Update 2.12-1.212.el6_10.3.i686
Updated nspr-4.9.5-2.el6_4.i686
Update 4.21.0-1.el6_10.i686
Updated nss-3.14.3-4.el6_4.i686
Update 3.44.0-7.el6_10.i686
Updated nss-pam-ldapd-0.7.5-18.2.el6_4.i686
Update 0.7.5-32.el6_10.1.i686
Updated nss-softokn-3.14.3-3.el6_4.i686
Update 3.44.0-6.el6_10.i686
Updated nss-softokn-freebl-3.14.3-3.el6_4.i686
Update 3.44.0-6.el6_10.i686
Updated nss-sysinit-3.14.3-4.el6_4.i686
Update 3.44.0-7.el6_10.i686
Updated nss-tools-3.14.3-4.el6_4.i686
Update 3.44.0-7.el6_10.i686
Updated nss-util-3.14.3-3.el6_4.i686
Update 3.44.0-1.el6_10.i686
Updated ntp-4.2.4p8-3.el6.centos.i686
Update 4.2.6p5-15.el6.centos.i686
Updated ntpdate-4.2.4p8-3.el6.centos.i686
Update 4.2.6p5-15.el6.centos.i686
Updated openldap-2.4.23-32.el6_4.1.i686
Update 2.4.40-16.el6.i686
Updated openldap-clients-2.4.23-32.el6_4.1.i686
Update 2.4.40-16.el6.i686
Updated openldap-devel-2.4.23-32.el6_4.1.i686
Update 2.4.40-16.el6.i686
Updated openssh-5.3p1-84.1.el6.i686
Update 5.3p1-124.el6_10.i686
Updated openssh-clients-5.3p1-84.1.el6.i686
Update 5.3p1-124.el6_10.i686
Updated openssh-server-5.3p1-84.1.el6.i686
Update 5.3p1-124.el6_10.i686
Updated openssl-1.0.0-27.el6_4.2.i686
Update 1.0.1e-58.el6_10.i686
Dep-Install p11-kit-0.18.5-2.el6_5.2.i686
Dep-Install p11-kit-trust-0.18.5-2.el6_5.2.i686
Updated pam-1.1.1-13.el6.i686
Update 1.1.1-24.el6.i686
Updated passwd-0.77-4.el6_2.2.i686
Update 0.77-7.el6.i686
Updated pciutils-libs-3.1.10-2.el6.i686
Update 3.1.10-4.el6.i686
Updated pcre-7.8-6.el6.i686
Update 7.8-7.el6.i686
Updated perl-4:5.10.1-131.el6_4.i686
Update 4:5.10.1-144.el6.i686
Updated perl-Module-Pluggable-1:3.90-131.el6_4.i686
Update 1:3.90-144.el6.i686
Updated perl-Pod-Escapes-1:1.04-131.el6_4.i686
Update 1:1.04-144.el6.i686
Updated perl-Pod-Simple-1:3.13-131.el6_4.i686
Update 1:3.13-144.el6.i686
Updated perl-libs-4:5.10.1-131.el6_4.i686
Update 4:5.10.1-144.el6.i686
Updated perl-version-3:0.77-131.el6_4.i686
Update 3:0.77-144.el6.i686
Updated pinentry-0.7.6-6.el6.i686
Update 0.7.6-8.el6.i686
Updated plymouth-0.8.3-27.el6.centos.i686
Update 0.8.3-29.el6.centos.i686
Updated plymouth-core-libs-0.8.3-27.el6.centos.i686
Update 0.8.3-29.el6.centos.i686
Updated plymouth-scripts-0.8.3-27.el6.centos.i686
Update 0.8.3-29.el6.centos.i686
Updated policycoreutils-2.0.83-19.30.el6.i686
Update 2.0.83-30.1.el6_8.i686
Updated procps-3.2.8-25.el6.i686
Update 3.2.8-45.el6_9.3.i686
Updated psmisc-22.6-15.el6_0.1.i686
Update 22.6-24.el6.i686
Updated python-2.6.6-37.el6_4.i686
Update 2.6.6-68.el6_10.i686
Dep-Install python-argparse-1.2.1-2.1.el6.noarch
Updated python-libs-2.6.6-37.el6_4.i686
Update 2.6.6-68.el6_10.i686
Updated python-pycurl-7.19.0-8.el6.i686
Update 7.19.0-9.el6.i686
Updated python-urlgrabber-3.9.1-8.el6.noarch
Update 3.9.1-11.el6.noarch
Updated ql2400-firmware-5.08.00-1.el6.noarch
Update 7.03.00-1.el6_5.noarch
Updated ql2500-firmware-5.08.00-1.el6.noarch
Update 7.03.00-1.el6_5.noarch
Updated rpcbind-0.2.0-11.el6.i686
Update 0.2.0-16.el6.i686
Updated rpm-4.8.0-32.el6.i686
Update 4.8.0-59.el6.i686
Updated rpm-libs-4.8.0-32.el6.i686
Update 4.8.0-59.el6.i686
Updated rpm-python-4.8.0-32.el6.i686
Update 4.8.0-59.el6.i686
Updated rsyslog-5.8.10-7.el6_4.i686
Update 5.8.10-12.el6.i686
Updated samba-common-3.6.9-151.el6_4.1.i686
Update 3.6.23-53.el6_10.i686
Updated samba-winbind-3.6.9-151.el6_4.1.i686
Update 3.6.23-53.el6_10.i686
Updated samba-winbind-clients-3.6.9-151.el6_4.1.i686
Update 3.6.23-53.el6_10.i686
Updated selinux-policy-3.7.19-195.el6_4.18.noarch
Update 3.7.19-312.el6.noarch
Updated selinux-policy-targeted-3.7.19-195.el6_4.18.noarch
Update 3.7.19-312.el6.noarch
Updated setup-2.8.14-20.el6_4.1.noarch
Update 2.8.14-23.el6.noarch
Updated shadow-utils-2:4.1.4.2-13.el6.i686
Update 2:4.1.5.1-5.el6.i686
Dep-Install shared-mime-info-0.70-6.el6.i686
Updated sqlite-3.6.20-1.el6.i686
Update 3.6.20-1.el6_7.2.i686
Updated strace-4.5.19-1.17.el6.i686
Update 4.8-11.el6.i686
Updated sudo-1.8.6p3-7.el6.i686
Update 1.8.6p3-29.el6_10.3.i686
Updated system-config-firewall-base-1.2.27-5.el6.noarch
Update 1.2.27-7.2.el6_6.noarch
Updated sysvinit-tools-2.87-4.dsf.el6.i686
Update 2.87-6.dsf.el6.i686
Updated tar-2:1.23-11.el6.i686
Update 2:1.23-15.el6_8.i686
Updated tcp_wrappers-libs-7.6-57.el6.i686
Update 7.6-58.el6.i686
Updated telnet-1:0.17-47.el6_3.1.i686
Update 1:0.17-49.el6_10.i686
Updated tree-1.5.3-2.el6.i686
Update 1.5.3-3.el6.i686
Updated tzdata-2013g-1.el6.noarch
Update 2020a-1.el6.noarch
Updated udev-147-2.46.el6.i686
Update 147-2.74.el6_10.i686
Updated upstart-0.6.5-12.el6_4.1.i686
Update 0.6.5-17.el6.i686
Updated util-linux-ng-2.17.2-12.9.el6_4.3.i686
Update 2.17.2-12.28.el6_9.2.i686
Updated vim-minimal-2:7.2.411-1.8.el6.i686
Update 2:7.4.629-5.el6_10.2.i686
Updated wget-1.12-1.8.el6.i686
Update 1.12-10.el6.i686
Updated xz-libs-4.999.9-0.3.beta.20091007git.el6.i686
Update 4.999.9-0.5.beta.20091007git.el6.i686
Updated yum-3.2.29-40.el6.centos.noarch
Update 3.2.29-81.el6.centos.0.1.noarch
Updated yum-plugin-fastestmirror-1.1.30-14.el6.noarch
Update 1.1.30-42.el6_10.noarch