"You can't delete contacts from read-only accounts." I'm trying to delete contacts from my Google account that's synced with my Nexus 5. It's synced as a Google account, not using Gmail IMAP or anything like that, but all of the contacts display this message when I try to delete them:

You can't delete contacts from read-only accounts, but you can hide them
in your contacts lists.


I don't understand why the Contacts app (default, from Google) is saying my Google account contacts are read-only. How do I correct this problem so I can fully edit contacts from my phone?
Have you tried going into the Apps list (the All tab) and clearing data for Contacts and Contacts Storage? 

Once that's done you can resync your phone with Google to get all of your original contacts back.