```
Successfully installed pip-21.0.1
WARNING: You are using pip version 20.2.1; however, version 21.0.1 is available.

```

Full trace

```
$ /usr/bin/python3 -m pip install --upgrade pip
Defaulting to user installation because normal site-packages is not writeable
Collecting pip
  Downloading pip-21.0.1-py3-none-any.whl (1.5 MB)
     |████████████████████████████████| 1.5 MB 19.7 MB/s
Installing collected packages: pip
  WARNING: The scripts pip, pip3 and pip3.6 are installed in '/home/ubuntu/.local/bin' which is not on PATH.
  Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
Successfully installed pip-21.0.1
WARNING: You are using pip version 20.2.1; however, version 21.0.1 is available.
You should consider upgrading via the '/usr/bin/python3 -m pip install --upgrade pip' command.

```

Despite upgrading why does it give the warning?