Only proceed if you are already unable to use your preferred ink cartridges.
I’ve had my HP OfficeJet Pro 8620 for years. It’s a tank – cheap to run with third-party cartridges, duplex scanning, the works. Then HP pushed a (version ending in .2348, I think). Suddenly, my compatible ink cartridges were “unauthorized” and the printer refused to print. Error 0xc19a0023. No warning. No option to roll back. hp officejet pro 8620 firmware downgrade