Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires acquia/acquia_cms 2.x-dev -> satisfiable by acquia/acquia_cms[2.x-dev]. - acquia/acquia_cms 2.x-dev requires drush/drush ^10 || ^11 || ^12 -> found drush/drush[10.0.0-alpha1, ..., 10.x-dev, 11.0.0-rc1, ..., 11.x-dev, 12.0.0-beta1, ..., 12.x-dev] but it conflicts with your root composer.json require (13.x-dev). Problem 2 - Root composer.json requires drupal/config_sync_without_site_uuid ^1.0@beta -> satisfiable by drupal/config_sync_without_site_uuid[1.0.0-beta1]. - drupal/config_sync_without_site_uuid 1.0.0-beta1 requires drupal/core ^9 || ^10 -> found drupal/core[9.0.0-alpha1, ..., 9.5.x-dev, 10.0.0-alpha1, ..., 10.4.x-dev] but it conflicts with your root composer.json require (11.x-dev). Problem 3 - Root composer.json requires drupal/core-dev 11.x-dev -> satisfiable by drupal/core-dev[11.x-dev]. - drupal/core-dev 11.x-dev requires phpunit/phpunit ^10.5.19 -> found phpunit/phpunit[10.5.19, ..., 10.5.x-dev] but it conflicts with your root composer.json require (^9.5). Problem 4 - drupal/acquia_cms_common dev-3.3.x requires drupal/core ^10.2.2 -> found drupal/core[10.2.2, ..., 10.4.x-dev] but it conflicts with your root composer.json require (11.x-dev). - drupal/acquia_cms_common 3.3.x-dev is an alias of drupal/acquia_cms_common dev-3.3.x and thus requires it to be installed too. - Root composer.json requires drupal/acquia_cms_common 3.3.x-dev -> satisfiable by drupal/acquia_cms_common[3.3.x-dev (alias of dev-3.3.x)].