Merge Contact
There may a scenario where a Contact has been duplicated. The Merge Contact function will merge one Contact's data into another and delete the currently selected Contact.
Find the Contact you want to merge from (this is the Contact that will be deleted). From the Advanced tab select Merge Contacts.
From the Merge Contacts Records screen use the drop-down arrow to find the Contact you are merging into.
Click Run.
The Merge Contact process is irreversible