[galaxy-commits] commit/galaxy-central: dannon: Migration 104 was using a Session() object that conflicts with the threadlocal strategy, which has been causing the '103 is not 105' migration errors we've seen. scoped_session works, but the threadlocal should probably be completely deprecated moving forward (removed from universe_wsgi.ini.sample by nate just now). See http://docs.sqlalchemy.org/en/rel_0_9/core/connections.html#threadlocal-strategy