How to change player start by trigger overlap

I have two trigger box two player start ,i want player pass trigger box afterward change the player start position。I try choose player start ,use player start tag,pass trigger change tag,to choose what I want player start。But change tag ,no effect.
Tag is changed,but player start no change. Is there any solution?
Please forgive me for the bad English, with the Google translation, as much as possible to express what I want to express.

I don’t really understand what you are trying to achieve here.

Do you want the player start to be changed permanently? (After you’ve stopped playing)

or

Do you want the player start to be changed while you’re still in game?

still in game