Youcanbook.me integration with Zoho CRM using Zoho Flow

Youcanbook.me integration with Zoho CRM using Zoho Flow

I am trying to create a flow where bookings generated on Youcanbook.me then create a contact on Zoho CRM with those details stored. The flow fails due to a 'BigInt' issue which is related to the CRM contact owner field in the flow. How do I work around this? As the contact owner is known as well