Default Account for Contacts

Hello,

I’m trying to sync my contacts to iCloud but the default account keeps reverting back to Yahoo.

I selected All iCloud in Phone/Groups/All iCloud and deselected and reselected Contacts to merge the contacts on my phone to iCloud but to no avail.

I noticed that the Yahoo account becomes the default every time I deselect and reselect Contacts in Apple ID, iCloud, Media and Purchases but can’t figure out why.

I even restarted the iPhoneX without success.

Any ideas are appreciated.

Thanks a bunch.