Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires drupal/core-dev ^11.1.1 -> satisfiable by drupal/core-dev[11.1.1, ..., 11.x-dev]. - drupal/core-dev[11.1.1, ..., 11.1.x-dev] require phpunit/phpunit ^10.5.19 -> satisfiable by phpunit/phpunit[10.5.19, ..., 10.5.x-dev]. - drupal/core-dev[11.2.0-alpha1, ..., 11.2.x-dev] require phpunit/phpunit ^10.5.19 || ^11.5.3 -> satisfiable by phpunit/phpunit[10.5.19, ..., 10.5.x-dev, 11.5.3, ..., 11.5.x-dev]. - drupal/core-dev 11.x-dev requires phpunit/phpunit ^10.5.19 || ^11.5.34 -> satisfiable by phpunit/phpunit[10.5.19, ..., 10.5.x-dev, 11.5.34, ..., 11.5.x-dev]. - phpunit/phpunit[10.3.5, ..., 10.5.26] require sebastian/diff ^5.0 -> found sebastian/diff[5.0.0, ..., 5.1.x-dev] but the package is fixed to 7.0.0 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. - phpunit/phpunit[10.5.27, ..., 10.5.x-dev] require sebastian/diff ^5.1.1 -> found sebastian/diff[5.1.1, 5.1.x-dev] but the package is fixed to 7.0.0 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. - phpunit/phpunit[11.5.3, ..., 11.5.x-dev] require sebastian/diff ^6.0.2 -> found sebastian/diff[6.0.2, 6.0.x-dev] but the package is fixed to 7.0.0 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.