Looks like you are trying to import a ZFS pool built with a newer version. Have you got another version of Solaris 10 running on a zone? Where did you export the pool from?
That doesn't make sense. Older version pools can be read by newer Solaris updates, not the other way around (hopefully). Latest Solaris 10 (8/11) supports zpool versions up to 29. Solaris 11 supports up to 32 or 33.
Use a recent Solaris release and check to actual pool version from it.