Duplicate Enteries for Facebook Messenger with Zapier

I have made up a zap to create a new lead in my Customers Board when I get a message in Facebook Messenger to my business page. The problem is that everytime that customer messages me, it creates a NEW customer each time. So if they have replied to me 4 times, there are 4 new customer entries.

Is there a way to make an “IF” statement somewhere in Zapier, or have Monday.com delete these duplicate entries?

Thank you!