Your lock file does not contain a compatible set of packages. Please run composer update. Problem 1 - lts/php-qa-ci is present at version dev-php8.4 and cannot be modified by Composer - phpstan/phpstan is locked to version 2.1.39 and an update of this package was not requested. - Only one of these can be installed: phpstan/phpstan[2.1.39], lts/php-qa-ci[dev-php8.4]. lts/php-qa-ci replaces phpstan/phpstan and thus cannot coexist with it.