Mass Update of Account Contact Related Information.

Is there a way to mass update Account Contact Related Information records ???

Brief history on the issue :

Administrator has added a new custom field for the Account Contact object for adding Contact Owner Full Name into this Custom field.

This has been done via Field Management using JoinFieldValue expression -  JoinFieldValue('<Contact>',[<ContactId>],'<OwnerFullName>')  .

So far so good, the issue is that this custom field is updated with the Contact owner Full name via default value on the field (defined as above JoinFieldValue expression), IF and only IF, the Account Contact record is removed from the Account Contact related information section and than added again.