cached metadata for table "<str>" invalidated by online change

  Explanation:  An online metadata change  to  the  TABLE  in  the
  exception  message has produced a new version of the TABLE.  The
  exception indicates  an  attempt  to  update  a  record  in  the
  database  with  obsolete,  in-  consistent  metadata from the in
  memory cache.

  User Action:  Detach and re-attach to the database.   This  will
  cause  any  cached  metadata  to  be reloaded into the in memory
  symbol tables.