Firmware rollback needed. need 1848AR downgraded to 1834AR No one at HP seem's to know "how"

[IDtech40]

Have the HP 8710 

recent auto update disabled aftermarket cartdriges 
( two identicle printers side by side ) one reads the cartdriges just fine and has 1834AR  the other has the firmware 1848AR and claims the cartdriges are not installed properly / used cartdridges.

the OOPE is set to disable in the system access menu on the printer ( this does nothing ).
problem is not with the cartdriges as they work perfectly in the other unit. 

Technicians claim "there is no way to rollback firmware"  

this is a bit stupid....  can someone please chime in here?

[Valsimot]

Type:

Firmware

Version:

1834A

Operating systems:

Windows 10 (64-bit)

Release date:

Aug 31, 2018

File name:

OJP8710_1834A.exe

(30.2 MB)

Description:

This firmware update addresses an important security vulnerability (see Security Bulletin HPSBHF03589 on the HP Support Page)
Note: This firmware version disables features that could prevent certain ink cartridges containing non-HP security chips from working in printers manufactured prior to December 1, 2016. Please note that HP cannot guarantee the quality or reliability of non-HP cartridges.

Fix and enhancements:

• Critical security fixes
• Several User Experience improvement
• Added support for SMBv2 and SMBv3 for Scan-to-Network-Folder which is configurable through Embedded Web Server
• Removed Sign-in button when Access Control is not configured
• Fixes issue Copy ID printing issue
• Fixes printing issue when using Secure AirPrint