downgrading from cassandra 0.8 to 0.7.3

[Anurag Gujral]

Hi All,
          I moved to cassandra 0.8.0 from cassandra-0.7.3 when I  try to
move back I get the following error:
java.lang.RuntimeException: Can't open sstables from the future! Current
version f, found file: /data/cassandra/data/system/Schema-g-9.

Please suggest.

Thanks
Anurag