Your requirements could not be resolved to an installable set of packages. Problem 1 - phpunit/phpunit[11.4.2, ..., 11.5.1] require phpunit/php-code-coverage ^11.0.7 -> satisfiable by phpunit/php-code-coverage[11.0.7, 11.0.8]. - phpunit/phpunit[11.3.2, ..., 11.4.1] require phpunit/php-code-coverage ^11.0.6 -> satisfiable by phpunit/php-code-coverage[11.0.6, 11.0.7, 11.0.8]. - phpunit/phpunit[11.2.7, ..., 11.3.1] require phpunit/php-code-coverage ^11.0.5 -> satisfiable by phpunit/php-code-coverage[11.0.5, 11.0.6, 11.0.7, 11.0.8]. - phpunit/phpunit[11.0.0, ..., 11.2.6] require phpunit/php-code-coverage ^11.0 -> satisfiable by phpunit/php-code-coverage[11.0.0, ..., 11.0.8]. - phpunit/php-code-coverage[11.0.7, ..., 11.0.8] require nikic/php-parser ^5.3.1 -> satisfiable by nikic/php-parser[v5.3.1]. - phpunit/php-code-coverage 11.0.6 requires nikic/php-parser ^5.1.0 -> satisfiable by nikic/php-parser[v5.1.0, v5.2.0, v5.3.0, v5.3.1]. - phpunit/php-code-coverage[11.0.0, ..., 11.0.5] require nikic/php-parser ^5.0 -> satisfiable by nikic/php-parser[v5.0.0, ..., v5.3.1]. - 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, ..., v5.3.1]. - lctrs/psalm-psr-container-plugin 1.10.0 requires nikic/php-parser ^4.18.0 -> satisfiable by nikic/php-parser[v4.18.0, ..., v4.19.4]. - Conclusion: don't install nikic/php-parser v4.18.0 (conflict analysis result) - Root composer.json requires lctrs/psalm-psr-container-plugin ^1.10 -> satisfiable by lctrs/psalm-psr-container-plugin[1.10.0]. - Root composer.json requires phpunit/phpunit ^11.0.0 -> satisfiable by phpunit/phpunit[11.0.0, ..., 11.5.1]. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.