Thanks for answer. You can answer in german if you prefer. I have a basic understanding, just my writing skills are bad.
But can this Liefering anomaly be changed in editor? From my knowledge there is a team in Hong Kong league from Guangzhou (China) which can field unlimited number of chinese players even though there is max. 4 foreign players rule in the league. So surely it can be done in editor. The only problem is that I cannot verify nation rules in editor as i wrote above and i would like to know why.
I have this crazy Red Bull project in mind where i would manage all Red Bull teams (Salzburg, Liefering, Leipzig, NY and Red Bull Brasil) and Liefering would be my farm team as in real life but this rule is too strict and i would like to change it.