Updating leads via Zapier

Updating leads via Zapier

Hi,

I want to create Zap to update any lead when the customer adds a new car,

I managed to create a lead when a new row has been added to the MySQL table "customers",
but I failed to create a zap to update the created lead's details when another row is created in another table "Vehicles".

btw, I created a search step to find the related lead, but still no luck.

And I always get this error 

  1. Failed to create a module entry in Zoho CRM
  2. Unable to create entry in module: Leads. Error : the id given seems to be invalid

I think my issue is that I don't know how to connect leads with the related rows, or simply the logic of Zapier.

thanks