Printing Errors or Lights & Stuck Print Jobs

I bought a HP OfficeJet Pro 6970 about 18 months ago.   For the last couple of months I've been using a couple of non-HP ink catridges and there's been no problem.  The printer did a firmware update for the first time last night updating to the latest firmware.   Conincidentally, the Cyan and Yellow ink catridges ran out immediately after the update and I replaced them with two non-HP branded catridges.  Since the firmware update,  I have been getting the following error message:  "One or more cartridges appear to be damaged".  

I have researched online and I understand that this is a result of the recent firmware having a dynamic security feature; and the HP article (https://support.hp.com/us-en/document/c05308850) states that the newest version of the firmware will allow this feature to be turned off.  However, the same article states in respect of the  HP OfficeJet Pro 6970: " this update disables dynamic security for printers manufactured before December 1, 2016. For printers manufactured on December 1, 2016 or later, dynamic security remains functional with this update."

Given I only bought the printer in 2017, I assume that it is a post December 1, 2016 model.

Is there anyway to rollback the firmware so I can use the printer with non-HP catridges?  Alternatively as there anything else that can be done?

I think this is pretty unreasonable behaviour by HP to include a feature which disables third party catridges to be used (in particular after the warranty period) - especially as there was no warning of this before the firmware installed!  It is also unreasonable that there is no readily available solution for post December 1, 2016 models of this printer.