Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires shopware/core v6.6.6.0-rc2, found shopware/core[dev-trunk, dev-6.0+ea, v6.0.0+ea2, ..., 6.6.x-dev (alias of dev-trunk)] but it does not match the constraint. Problem 2 - shopware/administration[v6.0.0+ea2, ..., 6.3.5.4] require shopware/core * -> found shopware/core[v6.0.0+ea2, ..., v6.6.0.0-rc2] but it conflicts with your root composer.json require (v6.6.6.0-rc2). - shopware/administration 6.4.0.0 requires shopware/core v6.4.0.0 -> found shopware/core[6.4.0.0] but it conflicts with your root composer.json require (v6.6.6.0-rc2). - shopware/administration 6.4.1.0 requires shopware/core v6.4.1.0 -> found shopware/core[6.4.1.0] but it conflicts with your root composer.json require (v6.6.6.0-rc2). - shopware/administration 6.4.1.1 requires shopware/core v6.4.1.1 -> found shopware/core[6.4.1.1] but it conflicts with your root composer.json require (v6.6.6.0-rc2). - shopware/administration 6.4.1.2 requires shopware/core v6.4.1.2 -> found shopware/core[6.4.1.2] but it conflicts with your root composer.json require (v6.6.6.0-rc2). - shopware/administration 6.4.2.0 requires shopware/core v6.4.2.0 -> found shopware/core[6.4.2.0] but it conflicts with your root composer.json require (v6.6.6.0-rc2). - shopware/administration 6.4.2.1 requires shopware/core v6.4.2.1 -> found shopware/core[6.4.2.1] but it conflicts with your root composer.json require (v6.6.6.0-rc2). - shopware/administration 6.4.3.0 requires shopware/core v6.4.3.0 -> found shopware/core[6.4.3.0] but it conflicts with your root composer.json require (v6.6.6.0-rc2). - shopware/administration 6.4.3.1 requires shopware/core v6.4.3.1 -> found shopware/core[6.4.3.1] but it conflicts with your root composer.json require (v6.6.6.0-rc2). - shopware/administration 6.4.4.0 requires shopware/core v6.4.4.0 -> found shopware/core[6.4.4.0] but it conflicts with your root composer.json require (v6.6.6.0-rc2). - shopware/administration 6.4.4.1 requires shopware/core v6.4.4.1 -> found shopware/core[6.4.4.1] but it conflicts with your root composer.json require (v6.6.6.0-rc2). - shopware/administration 6.4.5.0 requires shopware/core v6.4.5.0 -> found shopware/core[6.4.5.0] but it conflicts with your root composer.json require (v6.6.6.0-rc2). - shopware/administration 6.4.5.1 requires shopware/core v6.4.5.1 -> found shopware/core[6.4.5.1] but it conflicts with your root composer.json require (v6.6.6.0-rc2). - shopware/administration 6.4.6.0 requires shopware/core v6.4.6.0 -> found shopware/core[6.4.6.0] but it conflicts with your root composer.json require (v6.6.6.0-rc2). - shopware/administration 6.4.6.1 requires shopware/core v6.4.6.1 -> found shopware/core[6.4.6.1] but it conflicts with your root composer.json require (v6.6.6.0-rc2). - shopware/administration 6.4.7.0 requires shopware/core v6.4.7.0 -> found shopware/core[6.4.7.0] but it conflicts with your root composer.json require (v6.6.6.0-rc2). - shopware/administration 6.4.8.0 requires shopware/core v6.4.8.0 -> found shopware/core[6.4.8.0] but it conflicts with your root composer.json require (v6.6.6.0-rc2). - shopware/administration 6.4.8.1 requires shopware/core 6.4.8.1 -> found shopware/core[6.4.8.1] but it conflicts with your root composer.json require (v6.6.6.0-rc2). - shopware/administration 6.4.8.2 requires shopware/core v6.4.8.2 -> found shopware/core[6.4.8.2] but it conflicts with your root composer.json require (v6.6.6.0-rc2). - shopware/administration 6.4.9.0 requires shopware/core v6.4.9.0 -> found shopware/core[6.4.9.0] but it conflicts with your root composer.json require (v6.6.6.0-rc2). - shopware/administration 6.4.10.0 requires shopware/core v6.4.10.0 -> found shopware/core[6.4.10.0] but it conflicts with your root composer.json require (v6.6.6.0-rc2). - shopware/administration 6.4.10.1 requires shopware/core v6.4.10.1 -> found shopware/core[6.4.10.1] but it conflicts with your root composer.json require

Process completed with exit code 2.