For following points :

a/ select a transition in tree

b/ select "Add a condition"

c/ Choose  following condition  

d/ Fill id field with "test" and click on ok. 

Point 1 : 

a/ Error on "courrant"

b/ {0} instead of test

Point 2 : 

Add a new condition 

=> In the new frame, id is still fill with "test", it should be empty.