Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires typo3/cms-backend ^14.0 -> satisfiable by typo3/cms-backend[v14.0.2, v14.1.0, v14.1.1, v14.3.0]. - typo3/cms-backend v14.0.2 requires typo3/cms-core 14.0.2 -> found typo3/cms-core[v14.0.2] but it conflicts with your root composer.json require (^12.0 || ^13.0). - typo3/cms-backend v14.1.0 requires typo3/cms-core 14.1.0 -> found typo3/cms-core[v14.1.0] but it conflicts with your root composer.json require (^12.0 || ^13.0). - typo3/cms-backend v14.1.1 requires typo3/cms-core 14.1.1 -> found typo3/cms-core[v14.1.1] but it conflicts with your root composer.json require (^12.0 || ^13.0). - typo3/cms-backend v14.3.0 requires typo3/cms-core 14.3.0 -> found typo3/cms-core[v14.3.0] but it conflicts with your root composer.json require (^12.0 || ^13.0). Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.