Can someone help me?  I have accidentally introduced a lot of duplicated Contacts to my Zoho CRM.  I did a backup of the whole database and downloaded it into Excel.  There were about 10,500 contacts.  I then ran a deduplication in Excel of the Contact records selecting for First Name, Last Name and Account ID.  This has produced a CSV file of about 7,000 contacts, which I inspected and which found does not have any duplicate contact names.  

Now, how do I remove the existing Contact records from Zoho and import the deduplicated spreadsheet instead?  I think if I do that I will have succesfully removed the duplicate contacts.

Anyone able to help?

William