Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Conclusion: don't install sonata-project/admin-bundle 3.8.0
    - Conclusion: don't install sonata-project/admin-bundle 3.7.1
    - Conclusion: don't install sonata-project/admin-bundle 3.7.0
    - Conclusion: don't install sonata-project/admin-bundle 3.6.0
    - Conclusion: don't install sonata-project/admin-bundle 3.5.0
    - Conclusion: remove sonata-project/admin-bundle 3.4.0
    - Conclusion: don't install sonata-project/admin-bundle 3.4.0
    - Conclusion: don't install sonata-project/admin-bundle 3.3.2
    - Conclusion: don't install sonata-project/admin-bundle 3.3.1
    - Conclusion: don't install sonata-project/admin-bundle 3.3.0
    - Conclusion: don't install sonata-project/admin-bundle 3.2.0
    - Conclusion: don't install sonata-project/admin-bundle 3.1.0
    - Conclusion: don't install sonata-project/admin-bundle 3.0.0
    - Installation request for sonata-project/admin-bundle ^3.0 -> satisfiable by sonata-project/admin-bundle[3.0.0, 3.1.0, 3.2.0, 3.3.0, 3.3.1, 3.3.2, 3.4.0, 3.5.0, 3.6.0, 3.7.0, 3.7.1, 3.8.0, 3.x-dev].
    - Conclusion: don't install sonata-project/block-bundle 2.2.15
    - sonata-project/admin-bundle 3.x-dev requires sonata-project/block-bundle ^3.1.1 -> satisfiable by sonata-project/block-bundle[3.1.1, 3.2.0, 3.x-dev].
    - Can only install one of: sonata-project/block-bundle[2.2.15, 3.1.1].
    - Can only install one of: sonata-project/block-bundle[3.1.1, 2.2.15].
    - Can only install one of: sonata-project/block-bundle[3.2.0, 2.2.15].
    - Can only install one of: sonata-project/block-bundle[3.x-dev, 2.2.15].
    - Installation request for sonata-project/block-bundle (locked at 2.2.15) -> satisfiable by sonata-project/block-bundle[2.2.15].