Problem on attaching event

Problem on attaching event

Hi everyone,
I have tre select.
- the first one has attached a change event which modifies the second one
- the second one has attached a change event which modifies the third one.
Now, the first select correctly works but after the call, the second select is not able to recall the associated event.
I suppose it is connected with the previous call of the first event and that I probably have to reattach in some way the second event but I don't know how.
Could someone help me?
Giorgio

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