Thank u Emily from Help center for helping me . 
and plus , 
I opened this new acc and use this ID bcuz * 
I worried that faker might take this @crystalmiyo ID with new other acc again . 
from now on , this @crystalmiyo ID is under same control by 
@crystal_miyo ID . 

now , crystalmiyo & crystal_miyo are both of my IDs so I have no worries now. 

thank u Emily ^^ xoxo :*