Upgrade from 9.5.1 to 10 throws error on all dependencies

Hi @sidney.desousa

In composer.json file try to edit the "minimum-stability": "dev" to "minimum-stability": "stable" if your using this site for production build.
try to run composer why-not drupal/module to see which dependencies are causing the conflict.

Try asking in the composer channel in slack

See drupal.org/slack for how to join

Also running this might give better output

composer why-not drupal/core 10 -t

At least two of the issues here are:

    - acquia/drupal-spec-tool v5.0.0 requires drupal/core ^9.0 -> found drupal/core[9.0.0-alpha1, ..., 9.5.x-dev] but it conflicts with your root composer.json require (^10).

    - drupal/admin_toolbar_tools 2.5.0 requires drupal/core ^8.8.0 || ^9.0 -> found drupal/core[8.8.0-alpha1, ..., 8.9.x-dev, 9.0.0-alpha1, ..., 9.5.x-dev] but it conflicts with your root composer.json require (^10).

The versions of these modules are for Drupal 9 so Composer is refusing to update to Drupal 10.

I agree, the command output usually tells you what is wrong. You must read it in full.

I spent some time debugging, here is what happens.

#3 I ran composer why-not drupal/core 10 -t and below is the result:

├──acquia/blt-project dev-main (requires drupal/core ^9.5)
├──acquia/drupal-spec-tool v5.0.0 (requires drupal/core ^9.0)
│  └──acquia/blt-project dev-main (requires acquia/drupal-spec-tool *)
├──drupal/admin_toolbar_tools 2.5.0 (requires drupal/core ^8.8.0 || ^9.0)
│  └──acquia/blt-project dev-main (requires drupal/admin_toolbar_tools ^2.0)
├──drupal/core-recommended 9.5.11 (requires drupal/core 9.5.11)
│  └──acquia/blt-project dev-main (requires drupal/core-recommended ^9.5)
├──drupal/field_css 2.0.0-rc4 (requires drupal/core ^8.8.4 || ^9)
│  └──acquia/blt-project dev-main (requires drupal/field_css ^2.0@RC)
├──drupal/core 10.0.0 (requires symfony/console ^6.2) (circular dependency aborted here)
├──acquia/blt-project dev-main (does not require symfony/console but v4.4.49 is installed) (circular dependency aborted here)
├──drupal/core 10.0.0 (requires symfony/dependency-injection ^6.2) (circular dependency aborted here)
├──acquia/blt-project dev-main (does not require symfony/dependency-injection but v4.4.49 is installed) (circular dependency aborted here)
├──drupal/core 10.0.0 (requires symfony/event-dispatcher ^6.2) (circular dependency aborted here)
├──acquia/blt-project dev-main (does not require symfony/event-dispatcher but v4.4.44 is installed) (circular dependency aborted here)
├──drupal/core 10.0.0 (requires symfony/http-foundation ^6.2) (circular dependency aborted here)
├──acquia/blt-project dev-main (does not require symfony/http-foundation but v4.4.49 is installed) (circular dependency aborted here)
├──drupal/core 10.0.0 (requires symfony/http-kernel ^6.2) (circular dependency aborted here)
├──acquia/blt-project dev-main (does not require symfony/http-kernel but v4.4.50 is installed) (circular dependency aborted here)
├──drupal/core 10.0.0 (requires symfony/mime ^6.2) (circular dependency aborted here)
├──acquia/blt-project dev-main (does not require symfony/mime but v5.4.13 is installed) (circular dependency aborted here)
├──drupal/core 10.0.0 (requires symfony/routing ^6.2) (circular dependency aborted here)
├──acquia/blt-project dev-main (does not require symfony/routing but v4.4.44 is installed) (circular dependency aborted here)
├──drupal/core 10.0.0 (requires symfony/serializer ^6.2) (circular dependency aborted here)
├──acquia/blt-project dev-main (does not require symfony/serializer but v4.4.47 is installed) (circular dependency aborted here)
├──drupal/core 10.0.0 (requires symfony/validator ^6.2) (circular dependency aborted here)
├──acquia/blt-project dev-main (does not require symfony/validator but v4.4.48 is installed) (circular dependency aborted here)
├──drupal/core 10.0.0 (requires symfony/process ^6.2) (circular dependency aborted here)
├──acquia/blt-project dev-main (does not require symfony/process but v4.4.44 is installed) (circular dependency aborted here)
├──drupal/core 10.0.0 (requires symfony/yaml ^6.2) (circular dependency aborted here)
├──acquia/blt-project dev-main (does not require symfony/yaml but v4.4.45 is installed) (circular dependency aborted here)
├──drupal/core 10.0.0 (requires twig/twig ^3.4.3) (circular dependency aborted here)
├──acquia/blt-project dev-main (does not require twig/twig but v2.15.5 is installed) (circular dependency aborted here)
├──drupal/core 10.0.0 (requires guzzlehttp/guzzle ^7.5) (circular dependency aborted here)
├──acquia/blt-project dev-main (does not require guzzlehttp/guzzle but 6.5.8 is installed) (circular dependency aborted here)
├──drupal/core 10.0.0 (requires guzzlehttp/psr7 ^2.4) (circular dependency aborted here)
├──acquia/blt-project dev-main (does not require guzzlehttp/psr7 but 1.9.1 is installed) (circular dependency aborted here)
├──drupal/core 10.0.0 (requires asm89/stack-cors ^2.1) (circular dependency aborted here)
├──acquia/blt-project dev-main (does not require asm89/stack-cors but 1.3.0 is installed) (circular dependency aborted here)
├──drupal/core 10.0.0 (requires psr/log ^3.0) (circular dependency aborted here)
└──acquia/blt-project dev-main (does not require psr/log but 1.1.4 is installed) (circular dependency aborted here)

The very first line is tricky

acquia/blt-project dev-main (requires drupal/core ^9.5)

This is not a dependency, but the project itself if I understand correctly.

Then I tried resolving each dependency:

The drupal/admin_toolbar_tools does not seem to be a contributed module listed on drupal.org, and it requires Drupal 9 in its dependencies list when I look at the composer.lock file.

Am not sure about the drupal/core-recommended one

For the field_css module, I already applied a patch which handles the compatibility issue, but for some reason it still gives a problem to move to Drupal 10. See patch below:

https://www.drupal.org/files/issues/2022-12-24/field_css.2.0.x-dev.rector.patch

I think you are free to edit the "name" attribute to be the custom name of your project if that makes the output easier to parse.

The solution to my problem was to remove all the composer packages except the Drupal core ones.

After that I re-ran

composer require drupal/core:^10 drupal/core-composer-scaffold:^10 drupal/core-project-message:^10 drupal/core-recommended:^10 --no-install --no-update

composer update -W

From here on, I re-introduced all the dependencies.