Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires silverstripe/framework ^6 -> satisfiable by silverstripe/framework[6.x-dev]. - silverstripe/framework 6.x-dev requires silverstripe/assets ^2.2 -> satisfiable by silverstripe/assets[2.x-dev] from composer repo (https://repo.packagist.org) but silverstripe/assets is the root package and cannot be modified. See https://getcomposer.org/dep-on-root for details and assistance. Problem 2 - Root composer.json requires silverstripe/recipe-testing ^4 -> satisfiable by silverstripe/recipe-testing[4.x-dev]. - silverstripe/recipe-testing 4.x-dev requires silverstripe/framework ^5 -> found silverstripe/framework[5.0.0-alpha1, ..., 5.x-dev] but it conflicts with your root composer.json require (^6). Problem 3 - Root composer.json requires silverstripe/versioned ^3 -> satisfiable by silverstripe/versioned[3.x-dev]. - silverstripe/versioned 3.x-dev requires silverstripe/framework ^5.2 -> found silverstripe/framework[5.x-dev] but it conflicts with your root composer.json require (^6). Problem 4 - silverstripe/recipe-cms 5.x-dev requires silverstripe/versioned 2.x-dev -> found silverstripe/versioned[2.x-dev] but it conflicts with your root composer.json require (^3). - silverstripe/installer 5.x-dev requires silverstripe/recipe-cms 5.x-dev -> satisfiable by silverstripe/recipe-cms[5.x-dev]. - Root composer.json requires silverstripe/installer 5.x-dev -> satisfiable by silverstripe/installer[5.x-dev].

Process completed with exit code 2.