Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires silverstripe/config 3.x-dev (exact version match), found silverstripe/config[dev-pulls/1/sapphire-test-nine, 1.0.0-alpha5, ..., 1.x-dev, 2.0.0-alpha1, ..., 2.x-dev] but it does not match the constraint. Problem 2 - Root composer.json requires silverstripe/framework 6.x-dev -> satisfiable by silverstripe/framework[6.x-dev]. - silverstripe/framework 6.x-dev requires silverstripe/config ^3 -> found silverstripe/config[dev-pulls/1/sapphire-test-nine, 1.0.0-alpha5, ..., 1.x-dev, 2.0.0-alpha1, ..., 2.x-dev] but it does not match the constraint. 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.x-dev). Problem 4 - silverstripe/framework 6.x-dev requires silverstripe/config ^3 -> found silverstripe/config[dev-pulls/1/sapphire-test-nine, 1.0.0-alpha5, ..., 1.x-dev, 2.0.0-alpha1, ..., 2.x-dev] but it does not match the constraint. - silverstripe/mimevalidator 4.x-dev requires silverstripe/framework ^6 -> satisfiable by silverstripe/framework[6.x-dev]. - Root composer.json requires silverstripe/mimevalidator 4.x-dev -> satisfiable by silverstripe/mimevalidator[4.x-dev].

Process completed with exit code 2.