The upgrade operation for the search database: %1 on server: %2 belonging to search application: %3 has failed. This is because ...

The upgrade operation for the search database: %1 on server: %2 belonging to search application: %3 has failed. This is because the database has a schema version: %4 that greater than its target schema version: %5 supported by this farm. To resolve the problem, ensure that the database is correctly associated with this search application and the server(s) in the farm are updated with the appropriate patch, and then rerun upgrade.