Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires doctrine/phpcr-odm dev-symfony-7 as 2.0 -> satisfiable by doctrine/phpcr-odm[dev-symfony-7]. - doctrine/phpcr-odm dev-symfony-7 requires phpcr/phpcr-utils dev-symfony-7 as 1.3.0 -> found phpcr/phpcr-utils[dev-symfony-7] but it conflicts with your root composer.json require (^1.3). Problem 2 - symfony/error-handler[v4.4.0-BETA1, ..., v4.4.8] require php ^7.1.3 -> your php version (8.3.0-dev) does not satisfy that requirement. - symfony/error-handler[v5.0.0-BETA1, ..., v5.0.0-RC1] require php ^7.2.9 -> your php version (8.3.0-dev) does not satisfy that requirement. - symfony/error-handler[v5.0.0, ..., v5.1.0-RC1] require php ^7.2.5 -> your php version (8.3.0-dev) does not satisfy that requirement. - Only one of these can be installed: symfony/error-handler[v4.4.0-BETA1, ..., 4.4.x-dev, v5.0.0-BETA1, ..., 5.4.x-dev, v6.0.0-BETA1, ..., 6.4.x-dev], symfony/symfony[7.0.x-dev]. symfony/symfony replaces symfony/error-handler and thus cannot coexist with it. - Root composer.json requires symfony/symfony ^7@dev -> satisfiable by symfony/symfony[7.0.x-dev]. - Root composer.json requires symfony/error-handler ^4.4 || ^5.0 || ^6.0 -> satisfiable by symfony/error-handler[v4.4.0-BETA1, ..., 4.4.x-dev, v5.0.0-BETA1, ..., 5.4.x-dev, v6.0.0-BETA1, ..., 6.4.x-dev].