@devvv4ever ohhh！you are right, thank you!
How to flash address book on Android?
How to flash address book on Android without deleting address books on other synced devices?
Buy accident I merge all my contacts on my desktop. I uninstaller DAVx on Android in panic. When I restored my Contacts file and installed the DAVx back on Android I noticed that two letters PE were added to about 150 contacts.
This is not an issue with contacts via iCloud on iPad.
Question. How do I re-flash contacts on Android without deleting contact files on other synced devices?