Hi I not new Iphon7 and I register new AppleID and when I try to updates application on the screen is coming up my old Apple ID

Hi I bot new Iphon7 and I register new AppleID(dariuszpinkosz@***) and when I try to updates application on the screen is coming up my old Apple ID(dempeen@***) and ask me for the password which is not on the system no mor what cen I

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