CentOS pipのアップグレードとScapyのインストールエラー

pipのアップデートエラーとScapyのインストールエラーについて
御存知の方、解決方法を教えてください。

pipのアップデートエラーメッセージ

WARNING: Running pip install with root privileges is generally not a good idea. Try `__main__.py install --user` instead.
Collecting pip

Scapyのインストールエラーメッセージ

Requirement already satisfied: scapy-python3 in /usr/local/lib/python3.6/site-packages (0.26)
WARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager. It is recommended to use a virtual environment instead: https://pip.pypa.io/warnings/venv

efaulting to user installation because normal site-packages is not writeable
Requirement already satisfied:scapy-python3 in /usr/local/lib/python3.6/site-packages (0.26)

＜実施した手順＞
作業は、rootで実施しております。

CentOS Linux release 7.9.2009 (Core)

python -V	
	Python 2.7.5

iusリポジトリの追加

yum install -y https://repo.ius.io/ius-release-el7.rpm

yum repolist
　base/7/x86_64         CentOS-7 - Base                                     10,072
epel/x86_64           Extra Packages for Enterprise Linux 7 - x86_64      13,753
extras/7/x86_64       CentOS-7 - Extras                                      509
ius/x86_64            IUS for Enterprise Linux 7 - x86_64                    363
updates/7/x86_64      CentOS-7 - Updates                                   3,728
repolist: 28,425

python3.6インストール

yum install -y python36u python36u-libs python36u-devel python36u-pip

インストール結果確認

ls | grep python
　abrt-action-analyze-python
python
python2
python2.7
python3
python3-config
python3.6
python3.6-config
python3.6m
python3.6m-config
python3.6m-x86_64-config

pipのアップデート

python3.6 -m pip install --upgrade pip
　WARNING: Running pip install with root privileges is generally not a good idea. Try `__main__.py install --user` instead.
Collecting pip
  Downloading https://files.pythonhosted.org/packages/a4/6d/6463d49a933f547439d6b5b98b46af8742cc03ae83543e4d7688c2420f8b/pip-21.3.1-py3-none-any.whl (1.7MB)
    100% |????????????????????????????????| 1.7MB 754kB/s
Installing collected packages: pip
Successfully installed pip-21.3.1

Scapyのインストール

 pip3 install scapy-python3
　Requirement already satisfied: scapy-python3 in /usr/local/lib/python3.6/site-packages (0.26)
WARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager. It is recommended to use a virtual environment instead: https://pip.pypa.io/warnings/venv