Ahmed is using a webhook-triggered workflow's 'Set Property Value' action to update the standard 'Phone number' contact property, but it fails, likely due to data type mismatch (receiving a string from the webhook).

Alex Woodbridge confirms that you cannot directly copy a string value (from the webhook token) into a HubSpot property of type 'Phone number' using the standard 'Set Property Value' action. A conversion step is needed, potentially using a 'Format data' action (Ops Hub Pro+) or custom code to handle the type conversion before setting the property.