Thank you for your answer.
I create model like yours but I don't have same result. This is what I get.
Lets asume that I get same result.
Verbalisation of ExclusionConstraint is:
So, one employe is alocated some ParkingSpace or claims parking.
I create table in SQL, then I insert row and as you see Employee is allocated some ParkingSpace and claims parking.
Now I must generate some code.