This first part you circled serves:
Register a name and if that name already has it in the TAG list, it will not allow me to store again. Don’t let me store the same name.
Otherwise, it lets me store the name you entered.
Yes, you store that in firebase. But after storing, the ListaTag is erased. so next time there should be no entry in ListaTags
For me here does not erase. The list is stored in the database and new tags are added as many times as desired. 
but at last its calling get tags again and after that list will get refill with new data
UPDATE
I got it. “set Firebase_DB1.get Tag List” to “global ListaTags”
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at first we call get tags,
when got tags, we stored them to a list,
and compare data from that list.
and store data,
then clear that list, and called get tags again, so it will get tags again and save them to that list again… simple
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I took a look into .aia and found it
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