iOS updates on iPhone asking for different AppleID password
I have backed up my iphone4s to my computer using itunes.
I have restored the backup via itunes to new iphone 5s.
When an App needs to update it is showing a different AppleID than the one I use and asking for the password to continue.
Why would this be if backuped up with original AppleID?
Thanks
George
iPhone 4S, iOS 8.2