Your requirements could not be resolved to an installable set of packages. Problem 1 - symfony/symfony[v4.4.0, ..., v4.4.8] require php ^7.1.3 -> your php version (8.1.25) does not satisfy that requirement. - Root composer.json requires symfony/config ^5.4 || ^6.0 -> satisfiable by symfony/config[v6.1.0, v6.1.3, v6.1.11]. - setono/sylius-catalog-promotion-plugin v0.4.8 requires symfony/config ^4.4 || ^5.0 -> satisfiable by symfony/symfony[v4.4.0, ..., v4.4.50]. - Only one of these can be installed: symfony/symfony[v3.2.0, ..., v3.4.49, v4.1.0, ..., v4.4.50], symfony/config[v6.1.0, v6.1.3, v6.1.11]. symfony/symfony replaces symfony/config and thus cannot coexist with it. - Root composer.json requires setono/sylius-catalog-promotion-plugin ^0.4.8 -> satisfiable by setono/sylius-catalog-promotion-plugin[v0.4.8].