This command will normally only be used in the situation where the Compact and Backup Database command fails to repair a corrupt database.
The rebuilt database replaces the existing shared database (prs_data.mdb) which will be saved as prs_data_rebuilt_<nnn>.mdb.
NOTE: As in all situations involving a corrupt database it is possible that the rebuild will result in a loss of data, if this occurs the remedy is to revert to the last good backup.