这真让我抓狂。
Yum 告诉我，即使它找到了依赖的 RPM，它也无法解决依赖关系。
Yum 表示这sri-mcstools = 3.0_3_ge35b2fd-master是必需的并且可用，但不会安装。
为什么 yum 不使用可用的软件包？
[root@sri-5149-0001 tmp.jLCJVVQt09]# yum --disablerepo '*' --enablerepo sri-fme downgrade sri-transmitter-3.0_41_gb3e95c5-master
Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-manager
This system is not registered with an entitlement server. You can use subscription-manager to register.
sri-fme | 3.0 kB 00:00:00
sri-fme/primary_db | 13 kB 00:00:00
Resolving Dependencies
--> Running transaction check
---> Package sri-transmitter.noarch 0:3.0_41_gb3e95c5-master will be a downgrade
--> Processing Dependency: sri-FlexCpDsp-20-6008-01 = 3.0_10_g99ba8bd-master for package: sri-transmitter-3.0_41_gb3e95c5-master.noarch
--> Processing Dependency: sri-WebGui = 3.0_103_g4c065ee7-master for package: sri-transmitter-3.0_41_gb3e95c5-master.noarch
--> Processing Dependency: sri-filesystem = 3.0_6_g771b0c7-master for package: sri-transmitter-3.0_41_gb3e95c5-master.noarch
--> Processing Dependency: sri-flexcpkintex-02 = 3.0_3_gc037458-master for package: sri-transmitter-3.0_41_gb3e95c5-master.noarch
--> Processing Dependency: sri-mcstools = 3.0_3_ge35b2fd-master for package: sri-transmitter-3.0_41_gb3e95c5-master.noarch
---> Package sri-transmitter.noarch 0:3.0_59_g40bf51e-master will be erased
--> Finished Dependency Resolution
Error: Package: sri-transmitter-3.0_41_gb3e95c5-master.noarch (sri-fme)
Requires: sri-mcstools = 3.0_3_ge35b2fd-master
Installed: sri-mcstools-3.0_4_g288cb9a-master.noarch (@sri-latest)
sri-mcstools = 3.0_4_g288cb9a-master
Available: sri-mcstools-3.0_3_ge35b2fd-master.noarch (sri-fme)
sri-mcstools = 3.0_3_ge35b2fd-master