Than you agaida, apt purge wpasupplicant worked, but now I probably can't use wifi or?
Also, thank you for your effort hendrikL but I don't understand very much more now and no I don't want to learn about systemd or understand network vocabulary and how it works, I do other things.
I'm not using debian-unstable, I use siduction I know it's nearly pure debian unstable, but fixed so I can use it, i'ts been like that since all were on Kanotix, so I have been here for many many years without knowing this things. The day I have to fix the unstable problem myself I will start to use something else.
And also again, thank you everybody who make me be able to use siducion and debian-unstable, thank you everybody who try to help on the forum. I really appreciate it and have always done.
When I write something about a problem I have, it's not only to say that I want help, it's also a way to show the developers that there may be a problem that can and/or need to be fixed.
Enough OT, have a nice day everybody.