Sending data through Zapier to a single select field


I used Zapier to create a connection between freshbooks and airtable. Every time a student pays their invoice it automatically updates the record in airtable to list them as “paid”.

However the field is a drop down with two options - paid and invoiced.

After I sent data through Airtable the single select field now has paid twice!

What am I doing wrong? “Paid” is spelled exactly the same way in Zapier and Airtable