【yum】Error: Multilib version problems found.

「yum update」のエラー。
重複パッケージが原因。

「yum check」で重複パッケージを探し、
「yum remove」で重複パッケージで削除する。

「yum check」で重複パッケージが見つからなかった。

「package-cleanup –cleandupes」で重複パッケージをクリーン。
　※yum-utilsパッケージに「package-cleanup」は含まれてます

重複が無かったので当然クリーン出来ず。

「yum –setopt=protected_multilib=false update」にて、
アップデートを実施し、とりあえずアップデートする。

[sh]
Error: Multilib version problems found. This often means that the root
cause is something else and multilib version checking is just
pointing out that there is a problem. Eg.:

1. You have an upgrade for composer which is missing some
dependency that another package requires. Yum is trying to
solve this by installing an older version of composer of the
different architecture. If you exclude the bad architecture
yum will tell you what the root cause is (which package
requires what). You can try redoing the upgrade with
–exclude composer.otherarch … this should give you an error
message showing the root cause of the problem.

2. You have multiple architectures of composer installed, but
yum can only see an upgrade for one of those architectures.
If you don’t want/need both architectures anymore then you
can remove the one with the missing update and everything
will work.

3. You have duplicate versions of composer installed already.
You can use “yum check” to get yum show these errors.

…you can also use –setopt=protected_multilib=false to remove
this checking, however this is almost never the correct thing to
do as something else is very likely to go wrong (often causing
much more problems).

Protected multilib versions: composer-1.10.1-1.el7.noarch != composer-1.9.0-1.el7.remi.noarch
[/sh]