The keyword essentially specifies a "complete edition" built from a specific SDI version (11811) bundled with a specific SamDrivers collection (19020). It's like asking for a particular edition of a book (the book's edition number and its publication year).
If DriverPacks 19020 misses a component, the hardware may be too new for the 2019 database. You will need to connect the PC to the internet and use a newer version of SDI to fetch online indexes. Conclusion