Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires laminas/laminas-cache-storage-adapter-test ^4.1 -> satisfiable by laminas/laminas-cache-storage-adapter-test[4.1.0]. - laminas/laminas-cache-storage-adapter-test 4.1.0 requires phpunit/phpunit ^10.5 -> found phpunit/phpunit[10.5.0, ..., 10.5.35] but it conflicts with your root composer.json require (^11.0). Problem 2 - Root composer.json requires psalm/plugin-phpunit ^0.19.0 -> satisfiable by psalm/plugin-phpunit[0.19.0]. - Root composer.json requires phpunit/phpunit ^11.0 -> satisfiable by phpunit/phpunit[11.0.0, ..., 11.4.0]. - vimeo/psalm 5.26.0 requires nikic/php-parser ^4.17 -> satisfiable by nikic/php-parser[v4.17.0, ..., v4.19.4]. - vimeo/psalm[5.18.0, ..., 5.25.0] require nikic/php-parser ^4.16 -> satisfiable by nikic/php-parser[v4.16.0, ..., v4.19.4]. - Conclusion: don't install one of nikic/php-parser[v5.3.0], vimeo/psalm[5.26.1] | install nikic/php-parser[v4.17.0] (conflict analysis result) - You can only install one version of a package, so only one of these can be installed: nikic/php-parser[v4.0.0, ..., v4.19.4, v5.0.0, ..., v5.3.0]. - Conclusion: install nikic/php-parser v5.3.0 (conflict analysis result) - Root composer.json requires vimeo/psalm ^5.18 -> satisfiable by vimeo/psalm[5.18.0, ..., 5.26.1]. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.