Your requirements could not be resolved to an installable set of packages. Problem 1 - pimcore/admin-ui-classic-bundle[v1.0.0, ..., v1.0.2] require pimcore/pimcore ^11.0 -> found pimcore/pimcore[v11.0.0, ..., v11.1.0] but the package is fixed to v10.6.9 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. - pimcore/admin-ui-classic-bundle v1.0.3 requires pimcore/pimcore ^11.0.3 -> found pimcore/pimcore[v11.0.3, ..., v11.1.0] but the package is fixed to v10.6.9 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. - pimcore/admin-ui-classic-bundle v1.0.4 requires pimcore/pimcore ^11.0.4 -> found pimcore/pimcore[v11.0.4, ..., v11.1.0] but the package is fixed to v10.6.9 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. - pimcore/admin-ui-classic-bundle v1.0.5 requires pimcore/pimcore ^11.0.6 -> found pimcore/pimcore[v11.0.6, ..., v11.1.0] but the package is fixed to v10.6.9 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. - pimcore/admin-ui-classic-bundle[v1.0.6, ..., v1.1.4] require pimcore/pimcore ^11.0.7 -> found pimcore/pimcore[v11.0.7, ..., v11.1.0] but the package is fixed to v10.6.9 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. - pimcore/admin-ui-classic-bundle v1.2 requires pimcore/pimcore ^11.1 -> found pimcore/pimcore[v11.1.0] but the package is fixed to v10.6.9 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. - Root composer.json requires pimcore/admin-ui-classic-bundle * -> satisfiable by pimcore/admin-ui-classic-bundle[v1.0.0, ..., v1.2]. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.