RB951G-2HnD: save to downgrade to 5.26 from 6.42.2, and upgrade back to 6.42.2?

RouterOS General
1

Device: RB951G-2HnD, v6.42.2 ROS, v6.42.2 firmware

v6.42.2 ROS, v6.42.2 firmware → downgrade to 5.26 → upgrade to 6.42.2
I’d like to know if this is a safe and supported operation, or unsupported & dangerous.


Thank you!

2

You will lose license most likely.
Why do you want to do that?