The black rectangle that floats above a state, this GTE, there shall only be one...
Therefore, if one state has a given GTE (say "Attack") but the user adds the same GTE to another state (not by mistake but by will), Playmaker should automatically remove the old one so there's only one instance of that entering GTE, on the latest modified state.
It's a weird thing that this oddity is still present in Playmaker today in fact.
Let's just have an autoswap function to avoid illogical and useless duplicates of the same GTE inside a single FSM.