Old email association with Apple ID lost
I recently replaced my computer and restored from a time machine update. I then tried to sync my iPhone to iTunes and it keeps asking for the password for an old email that was previously associated with my Apple ID. I can access functionality with the current email address but the association between the old and new email addresses seems to have been lost resulting in lost access to multiple songs. Any idea how I restore this association?
Mac mini (Late 2014), OS X Yosemite (10.10.3), null