Printer bed upgrade and serial number question

Hi all Im looking to upgrade the bed so naturally i was looking at the modular bed system and i saw the warning that it didnt work with earlier models. My serial number doesnt seem to match the convention.
my serial number is KT-PR0045NA-11114
All of the serial numbers seem to be PR0035 not 45 and they all have four numbers at the end not five. has anyone seen this before? I want to go to a flexible build plate, i find with PLA i actually get too much adhesion on the bed and it makes the prints very hard to remove. Anyone use the octograb yet?

For anyone who might find this in the future, I contacted support and they said its a mini 1.04 that’s been refurbished.