New OM2P-HS (V2) no longer suitable for old v481 firmware

In the new OM2P0HS (V2) a small component change has been made, which makes it that the new units can no longer run on the old v481 firmware.
Currently the latest firmware is v6.1.1, therefore this shouldn't be a problem for most people.
Should this nevertheless be a problem, then we can deliver units on special request that are suitable for the old v481 firmware.
The new units on which the v481 firmware is no longer running can be recognized by the MAC address.
If it is higher than AC: 86: 74: 5E: xx: xx, then it is a new model that is not suitable for the v481 firmware.
Call us for more information.