How can I delete Duplicate key in SQL 2016?

Please help. I’m not into programming and i have this error on our server. Does anyone know how to delete duplicate key in this index? My Database name is 772

Error :The CREATE UNIQUE INDEX statement terminated because a duplicate key was found for the object name ‘dbo.Addresses’ and the index name ‘AddressAccountContactType’. The duplicate key value is (8cbd1462-37aa-434d-93cd-ebf5c227641b, 7d8bcd55-16b7-4372-8de8-6b643189dd0c, DEL).