Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires drupal/core 11.0.x-dev -> satisfiable by drupal/core[11.0.x-dev]. - drupal/core 11.0.x-dev requires php >=8.3.0 -> your php version (8.2.23) does not satisfy that requirement. Problem 2 - drupal/core 11.0.x-dev requires php >=8.3.0 -> your php version (8.2.23) does not satisfy that requirement. - drupal/shield 1.7.0 requires drupal/core ^9.2 || ^10 -> found drupal/core[9.2.0-alpha1, ..., 9.5.x-dev, 10.0.0-alpha1, ..., 10.4.x-dev] but it conflicts with your root composer.json require (11.0.x-dev). - acquia/acquia_cms dev-develop requires drupal/shield ^1.7 -> satisfiable by drupal/shield[1.7.0, 1.8.0, 1.x-dev]. - drupal/shield[1.8.0, ..., 1.x-dev] require drupal/core ^9.2 || ^10 || ^11 -> satisfiable by drupal/core[11.0.x-dev]. - Root composer.json requires acquia/acquia_cms * -> satisfiable by acquia/acquia_cms[dev-develop].