I tried to backup the whole RPi2 SDCard as an image with installed NodeRed.
Then I made a second card and used this card in the same RPi. - no Problem
But when I use this card in a differend RPi (same version) node-red will not start.
I think I've read about an key (cryptkey or userkey or.... I don't remember) and do not find this site anymore.
So my question.
Do I have to change some sort of key to run an already installed node-red an different hardware (same RPi version but "only" different MAC)?
When yes, where and how?