Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires phpstan/phpstan-phpunit ^2.0.4 -> satisfiable by phpstan/phpstan-phpunit[2.0.4, 2.0.x-dev]. - phpstan/phpstan-phpunit[2.0.4, ..., 2.0.x-dev] require phpstan/phpstan ^2.0.4 -> found phpstan/phpstan[2.0.4, ..., 2.1.x-dev] but it conflicts with your root composer.json require (^1.10.47). Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.