The never version is most likely part of Raspbian Buster, the next Raspbian release wich I guess is currently under testing.
I'm not sure if there is an official way to install packages from it yet. Or that its even recommended.
And you have made this system yourself ? Can you explain how it works because the words "master card" doesnt make much sense unless we have an Idea what its supposed to be "master" of.i have a very complex rfid system
Describing those problems is also a good idea.the problems referes to the SD and the write image process.