Your requirements could not be resolved to an installable set of packages. Problem 1 - silverstripe/recipe-testing[2.0.0, ..., 2.x-dev] require silverstripe/framework ^4.10 -> found silverstripe/framework[4.10.0-beta1, ..., 4.x-dev] but it conflicts with your root composer.json require (^6). - silverstripe/recipe-testing[3.0.0, ..., 3.x-dev] require silverstripe/framework ^5 -> found silverstripe/framework[5.0.0-alpha1, ..., 5.x-dev] but it conflicts with your root composer.json require (^6). - Root composer.json requires silverstripe/recipe-testing ^2 || ^3 -> satisfiable by silverstripe/recipe-testing[2.0.0, 2.0.x-dev, 2.x-dev, 3.0.0, 3.0.x-dev, 3.x-dev].

Process completed with exit code 2.