I have made a stupied action: I had delete my fork of openhab/openhab2-addons.
If I want to refork it, I got a error: "You already have a fork of this repository:…"
I have searched the internet for hours, but I found no solution.
this not work.
If I Push my “origin” it is not a fork but a public repro of my account.
The link (fork) to openhab/openhab2-addons is missing (no PR be able).
I found out: If you delete your fork on github.com there is no way to go back.
I have contact the suport of github.com. The suport has restored my repro from the backup and now it works again.