OpenLP does not work with SQLAlchemy 0.7

Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/openlp/core/lib/pluginmanager.py", line 95, in find_plugins
    __import__(modulename, globals(), locals(), [])
  File "/usr/lib/python2.7/site-packages/openlp/plugins/songs/songsplugin.py", line 36, in <module>
    from openlp.core.lib.db import Manager
  File "/usr/lib/python2.7/site-packages/openlp/core/lib/db.py", line 35, in <module>
    from sqlalchemy.exceptions import InvalidRequestError
ImportError: No module named exceptions