Binding variable or condition

In this example I have more classes that extends EntityBase (my class). In my intention, i would assign to variable $entity one of this class that is inserted in Ksession fact.

I insert fact of CtbMovrCoan class
In when statement of the rule at row 16, variable $entity is correctely,
but in then statement variable $entity becomes JtbRLavt class (first declared in then cond) and this behavior throw a ClassCastException, obviously.

Can Help me?