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我試圖安裝特羅韋，OpenStack的朱諾數據庫服務 我跟着一步一步在這個文檔http://docs.openstack.org/juno/install-guide/install/apt-debian/content/trove-install.html但我得到一個錯誤信息，我不知道如何解決錯誤當安裝了Trove的OpenStack朱諾
apt-get install python-trove python-troveclient python-glanceclient \ trove-common trove-api trove-taskmanager
The following packages have unmet dependencies: python-trove : Depends: python-sqlalchemy (< 0.9) but 0.9.7-1~cloud0 is to be installed E: Unable to correct problems, you have held broken packages.
請幫幫我！ Thank guys