Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires silverstripe/silverstripe-proxy-db ^3 -> satisfiable by silverstripe/silverstripe-proxy-db[3.x-dev]. - silverstripe/silverstripe-proxy-db 3.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 2 - Root composer.json requires silverstripe/subsites ^3 -> satisfiable by silverstripe/subsites[3.0.0-beta1, ..., 3.x-dev]. - silverstripe/subsites[3.0.0-beta1, ..., 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). Problem 3 - silverstripe/recipe-cms 4.x-dev requires silverstripe/versioned 1.x-dev -> found silverstripe/versioned[1.x-dev] but it conflicts with your root composer.json require (^3). - silverstripe/installer 4.x-dev requires silverstripe/recipe-cms 4.x-dev -> satisfiable by silverstripe/recipe-cms[4.x-dev]. - Root composer.json requires silverstripe/installer 4.x-dev -> satisfiable by silverstripe/installer[4.x-dev].

Process completed with exit code 2.