Your requirements could not be resolved to an installable set of packages. Problem 1 - symfony/test-pack is locked to version v1.2.0 and an update of this package was not requested. - symfony/test-pack v1.2.0 conflicts with phpunit/phpunit 10.5.60. - symfony/test-pack v1.2.0 conflicts with phpunit/phpunit 10.5.56. - symfony/test-pack v1.2.0 conflicts with phpunit/phpunit 10.5.55. - symfony/test-pack v1.2.0 conflicts with phpunit/phpunit 10.5.54. - symfony/test-pack v1.2.0 conflicts with phpunit/phpunit 10.5.49. - symfony/test-pack v1.2.0 conflicts with phpunit/phpunit 10.5.48. - symfony/test-pack v1.2.0 conflicts with phpunit/phpunit 10.5.47. - symfony/test-pack v1.2.0 conflicts with phpunit/phpunit 10.5.45. - symfony/test-pack v1.2.0 conflicts with phpunit/phpunit 10.5.38. - symfony/test-pack v1.2.0 conflicts with phpunit/phpunit 10.5.36. - symfony/test-pack v1.2.0 conflicts with phpunit/phpunit 10.5.30. - symfony/test-pack v1.2.0 conflicts with phpunit/phpunit 10.5.29. - symfony/test-pack v1.2.0 conflicts with phpunit/phpunit 10.5.26. - symfony/test-pack v1.2.0 conflicts with phpunit/phpunit 10.3.4. - symfony/test-pack v1.2.0 conflicts with phpunit/phpunit 10.3.3. - symfony/test-pack v1.2.0 conflicts with phpunit/phpunit 10.2.6. - symfony/test-pack v1.2.0 conflicts with phpunit/phpunit 10.1.0. - symfony/test-pack v1.2.0 conflicts with phpunit/phpunit 10.0.19. - symfony/test-pack v1.2.0 requires phpunit/phpunit * -> satisfiable by phpunit/phpunit[10.0.0, ..., 10.5.60]. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.