Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires ibexa/core ~5.0.x-dev -> satisfiable by ibexa/core[5.0.x-dev (alias of dev-main)]. - ibexa/core dev-main requires symfony/framework-bundle ^5.3.0 -> found symfony/framework-bundle[v5.3.0, ..., v5.4.45] but it conflicts with your root composer.json require (^6.4). - ibexa/core 5.0.x-dev is an alias of ibexa/core dev-main and thus requires it to be installed too.