Oracle Solution for Error ora-19831

ORA-19831: incompatible string.string.string.string DBMS_BACKUP_RESTORE package: string.string.string.string required

What triggered the Error:

is version of database was incompatible with the the indicated DBMS_BACKUP_RESTORE package installed in the database.

What should we do to fix it:

the database has been upgraded from an earlier version, ensure that the catxxxx.sql script has been run successfully. Re-install dbmsbkrs.sql and prvtbkrs.plb if necessary.