Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires staabm/phpstan-todo-by dev-staabm-patch-1 -> satisfiable by staabm/phpstan-todo-by[dev-staabm-patch-1]. - staabm/phpstan-todo-by dev-staabm-patch-1 requires phpstan/phpstan ^2.0 -> found phpstan/phpstan[2.0.0] but it conflicts with your root composer.json require (^1.10). Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.