Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires pimcore/generic-data-index-bundle @dev -> satisfiable by pimcore/generic-data-index-bundle[2.x-dev]. - pimcore/generic-data-index-bundle 2.x-dev requires pimcore/pimcore ^12.x-dev -> found pimcore/pimcore[12.x-dev] but it conflicts with your root composer.json require (11.x-dev as 11.99.9).

Process completed with exit code 2.

Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires pimcore/generic-data-index-bundle @dev -> satisfiable by pimcore/generic-data-index-bundle[2.x-dev]. - pimcore/elasticsearch-client[v1.1.0-RC1, ..., 1.x-dev] require pimcore/pimcore ^11.5 -> satisfiable by pimcore/pimcore[v11.5.0-RC1, ..., 11.x-dev]. - pimcore/generic-data-index-bundle 2.x-dev requires pimcore/elasticsearch-client ^1.1 -> satisfiable by pimcore/elasticsearch-client[v1.1.0-RC1, v1.1.0, 1.1.x-dev, 1.x-dev]. - pimcore/generic-data-index-bundle 2.x-dev requires pimcore/pimcore ^12.x-dev -> satisfiable by pimcore/pimcore[12.x-dev]. - You can only install one version of a package, so only one of these can be installed: pimcore/pimcore[v11.0.0-ALPHA1, ..., 11.x-dev, 12.x-dev].

Process completed with exit code 2.