Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires laminas/laminas-serializer ^3.0.0 -> satisfiable by laminas/laminas-serializer[3.0.0]. - Conclusion: don't install laminas/laminas-servicemanager 3.21.0 (conflict analysis result) - Conclusion: don't install laminas/laminas-servicemanager 3.20.0 (conflict analysis result) - Conclusion: don't install laminas/laminas-servicemanager 3.18.0 (conflict analysis result) - Conclusion: don't install laminas/laminas-servicemanager 3.15.1 (conflict analysis result) - laminas/laminas-session[2.17.0, ..., 2.21.0] require laminas/laminas-servicemanager ^3.22 -> satisfiable by laminas/laminas-servicemanager[3.22.0, 3.22.1]. - laminas/laminas-session 2.16.0 requires laminas/laminas-servicemanager ^3.15.1 -> satisfiable by laminas/laminas-servicemanager[3.15.1, ..., 3.22.1]. - Conclusion: don't install laminas/laminas-servicemanager 3.22.0 (conflict analysis result) - Root composer.json requires laminas/laminas-session ^2.16 -> satisfiable by laminas/laminas-session[2.16.0, ..., 2.21.0]. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.