前々回と同じにしたらProblemが出なかった。前回のことで、何か変わったのかもしれない。。。

$ composer outdated "drupal/*"
Info from https://repo.packagist.org: #StandWithUkraine
Color legend:
- patch or minor release available - update recommended
- major release available - update possible
drupal/core                   9.3.8  9.3.9 Drupal is an open source content management platform powering millions of websites and applications.
drupal/core-composer-scaffold 9.3.8  9.3.9 A flexible Composer project scaffold builder.
drupal/core-dev               9.3.8  9.3.9 require-dev dependencies from drupal/drupal; use in addition to drupal/core-recommended to run tes...
drupal/core-project-message   9.3.8  9.3.9 Adds a message after Composer installation.
drupal/core-recommended       9.3.8  9.3.9 Locked core dependencies; require this project INSTEAD OF drupal/core.
drupal/core-vendor-hardening  8.9.20 9.3.9 Hardens the vendor directory for when it's in the docroot.

$ composer update drupal/core "drupal/core-*" --with-all-dependencies
Loading composer repositories with package information
Updating dependencies
Lock file operations: 0 installs, 7 updates, 0 removals
  - Upgrading drupal/core (9.3.8 => 9.3.9)
  - Upgrading drupal/core-composer-scaffold (9.3.8 => 9.3.9)
  - Upgrading drupal/core-dev (9.3.8 => 9.3.9)
  - Upgrading drupal/core-project-message (9.3.8 => 9.3.9)
  - Upgrading drupal/core-recommended (9.3.8 => 9.3.9)
  - Upgrading guzzlehttp/psr7 (1.8.3 => 1.8.5)
  - Upgrading slevomat/coding-standard (7.0.19 => 7.0.20)
Writing lock file
Installing dependencies from lock file (including require-dev)
Package operations: 0 installs, 7 updates, 0 removals
  - Downloading guzzlehttp/psr7 (1.8.5)
  - Downloading drupal/core (9.3.9)
  - Downloading slevomat/coding-standard (7.0.20)
  - Upgrading drupal/core-composer-scaffold (9.3.8 => 9.3.9): Extracting archive
  - Upgrading drupal/core-project-message (9.3.8 => 9.3.9): Extracting archive
  - Upgrading guzzlehttp/psr7 (1.8.3 => 1.8.5): Extracting archive
  - Upgrading drupal/core (9.3.8 => 9.3.9): Extracting archive
  - Upgrading slevomat/coding-standard (7.0.19 => 7.0.20): Extracting archive
  - Upgrading drupal/core-dev (9.3.8 => 9.3.9)
  - Upgrading drupal/core-recommended (9.3.8 => 9.3.9)
    Cleaning: guzzlehttp/psr7
Package container-interop/container-interop is abandoned, you should avoid using it. Use psr/container instead.
Package doctrine/reflection is abandoned, you should avoid using it. Use roave/better-reflection instead.
Generating autoload files
Hardening vendor directory with .htaccess and web.config files.
86 packages you are using are looking for funding.
Use the `composer fund` command to find out more!
Cleaning vendor directory.

成功しているようだ。。。アクセスして、サイトの状態を見たら　9.3.6 と記載が出てる。

わからないけど、とりあえず、update.phpを実行