Calling of record type field is not working ...

local!readData: rule!PRO_qrtdata(lid: 244).data,

local!selectedCounty: if(
isnull(local!readData),
{},
local!leadData['recordType!PRO Read.fields.countyuniqueid
),

it is giving the error of    "Invalid index type: Record field uuid: 6225c036-92c6-4200-a11f-fb68f362b1a2 Record type uuid: 9c9d5cd6-8a4b-435b-88c3-6aa310c89afc Relationship path: null".