Updated slicer config, now wants me to update to 3.9.1 for printer software, which is not compatible with MK2s  

Updated slicer config, now wants me to update to 3.9.1 for printer software, which is not compatible with MK2s

Hi, I updated my slicer configuration .  it went from PrusaReseach Version 1.1.8, PrusaSlicer version 2.2.0 Alpha3 to PrusaReseach Version 1.1.12 and Prusa Slicer Version 2.2.0 Alpha3, so all that changed was from 1.1.8 to 1.1.12, actual Slicer version is the same.  But now when I try and print something from that my old (but still functional and well maintained) MK2S insists I need to update to 3.9.1, which is not a firmware the MK2S can use.  currently I am running the most current 3.2.3.   Obviously, a solution would be to roll back to the previous configuration so this does not happen.  OR, someone could fix the software so it does not insist I update to firmware I can not use every time I want to use the printer.   Some day I might get a MK3 but having my old printer harass me every print is not the best way to go about getting me to upgrade.