Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires phpstan/phpstan ^2.1.3, found phpstan/phpstan[2.1.x-dev] but it does not match your minimum-stability. Problem 2 - Root composer.json requires phpstan/phpstan-deprecation-rules ^1.2 || ^2.0 -> satisfiable by phpstan/phpstan-deprecation-rules[1.2.0, 1.2.1, 2.0.0, 2.0.1]. - phpstan/phpstan-deprecation-rules 1.2.0 requires phpstan/phpstan ^1.11 -> found phpstan/phpstan[1.11.0, ..., 1.12.16] but it conflicts with your root composer.json require (^2.1.3). - phpstan/phpstan-deprecation-rules 1.2.1 requires phpstan/phpstan ^1.12 -> found phpstan/phpstan[1.12.0, ..., 1.12.16] but it conflicts with your root composer.json require (^2.1.3). - phpstan/phpstan-deprecation-rules[2.0.0, ..., 2.0.1] require phpstan/phpstan ^2.0 -> found phpstan/phpstan[2.0.0, ..., 2.1.2] but it conflicts with your root composer.json require (^2.1.3).