Export yahoo contacts to csv fails to import to Outlook 2010

I have tried from 2 different pcs to export my Yahoo contacts to a csv file.

I have exported contacts many times to csv without having this issue, but not from Yahoo before.

When I try to import to Outlook 2010 I get a message which says that the column headings are invalid - they are present but not recognised for mapping purposes.

As I say I have tried exporting twice from different systems (win 10 home/pro 20h2). I have also uninstalled Outlook 2010 and reinstalled with no avail.

Is there a easy way to format the CSV file so that the column headings are properly recognised? I understand I am not in a unique position, but not sure I have the capability to reformat with python/pandas