Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires knplabs/doctrine-behaviors ^2.6 -> satisfiable by knplabs/doctrine-behaviors[2.6.0, 2.6.1, 2.6.2]. - knplabs/doctrine-behaviors 2.6.0 requires doctrine/persistence ^2.2 -> found doctrine/persistence[2.2.0, ..., 2.5.x-dev] but it conflicts with your root composer.json require (^3.0.2). - knplabs/doctrine-behaviors[2.6.1, ..., 2.6.2] require symfony/cache ^5.4|^6.0 -> found symfony/cache[v5.4.0-BETA1, ..., 5.4.x-dev, v6.0.0-BETA1, ..., 6.4.x-dev] but these were not loaded, likely because it conflicts with another require.