Stuck in my own house.

I play with my friend and today when I login, the game said the area around me is belong to someone else.
My friend buy the claim but he have me in his Kim list.
How could this happen and how to solve it?
My home is in his land and the house is surrounded by stone wall.
I have key but cannot open the door because of it's in other belonging land.
My friend buy the claim but he have me in his Kim list.
How could this happen and how to solve it?
My home is in his land and the house is surrounded by stone wall.
I have key but cannot open the door because of it's in other belonging land.