"Field 'id' expected a number but got 'Q291cnNlTm9kZTo0'.",

I enter the following:
mutation updatecourse{
updateCourse(input:
{
id:"Q291cnNlTm9kZTo0",
title: "编辑",
category:1
introduction: "niha",
cover: 2,
score: 20,
limitApplicationCount: 10
}
) {
course {
id
}
}
}

Returned:
{
"errors": [
{
"message": "Field 'id' expected a number but got 'Q291cnNlTm9kZTo0'.",
"locations": [
{
"line": 64,
"column": 3
}
],
"path": [
"updateCourse"
]
}
],
"data": {
"updateCourse": null
}
}