Riot account name change

I've had to change my username, because someone else from another region is using the same name, however, he/she is level 50 and rarely plays, meaning about once a month... Will they be forced to change their name, after changing my name, or do they get to keep their name because of inactivity. I honestly don't see how this is fair that he/she gets, essentially gets a higher priority just because the user rarely plays... If they are forced to change their name, regardless of me changing it, then I can see the balance...? Can anyone explain this to me. (that user and I are the only users with that username). What happens now riot. P.S I've been locked out of my account and forced to change it as of today, again, what about her/him?
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