Problem with 2 language site

Hi,

I dublicated a German post but it automatically duplicates the English version of it. I am looking for a way to disconnect it, since I only have the German version yet – but as soon as I delete it (or set it to private), the other one is deleted as well and so on.
I also tried to delete everything in the post so that its completely empty but this hasn′t worked as well.

Any suggestions?

Kind regards
Rebecca