err.js

operationName:null
query:"query ($id: ID!) {↵  item: flowLesson(id: $id) {↵    ...FlowLessonFields↵    __typename↵  }↵}↵↵fragment FlowLessonFields on Lesson {↵  id↵  priority↵  subject↵  description↵  recordUrl↵  date↵  deleted↵  __typename↵}↵"
variables:{id: "128"}
id:"128"

{data: {item: null}, errors: [,…]}
data:{item: null}
errors:[,…]
0:{message: "Cannot return null for non-nullable type: 'Int' within parent 'Lesson' (/item/priority)",…}
errorType:"DataFetchingException"
extensions:null
locations:null
message:"Cannot return null for non-nullable type: 'Int' within parent 'Lesson' (/item/priority)"
path:["item", "priority"]