Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires phpunit/phpunit ^12.0.0 -> satisfiable by phpunit/phpunit[12.0.0, ..., 12.5.8]. - phpunit/phpunit[12.0.0, ..., 12.3.12] require sebastian/exporter ^7.0.0 -> satisfiable by sebastian/exporter[7.0.0, 7.0.1, 7.0.2]. - phpunit/phpunit 12.3.13 requires sebastian/exporter ^7.0.1 -> satisfiable by sebastian/exporter[7.0.1, 7.0.2]. - phpunit/phpunit[12.3.14, ..., 12.5.8] require sebastian/exporter ^7.0.2 -> satisfiable by sebastian/exporter[7.0.2]. - sebastian/exporter[7.0.0, ..., 7.0.2] require sebastian/recursion-context ^7.0 -> found sebastian/recursion-context[7.0.0, 7.0.1] but it conflicts with your root composer.json require (^6.0.3). Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.