Nextjs PATCH API 500 error.My terminal Unknown argument `assignedToUserId`

When I try my PATCH API,I got 500. I npm run dev agin,it gets the same error
Postman:http://localhost:3000/api/issues/1
{
“assignedToUserId”:“xxxx”
}

VS terminal error:
⨯ PrismaClientValidationError:
Invalid prisma.issue.update() invocation:

{
where: {
id: 1
},
data: {
title: undefined,
description: undefined,
assignedToUserId: “xxxx”,
~~~~~~~~~~~~~~~~
? status?: Status | EnumStatusFieldUpdateOperationsInput,
? createdAt?: DateTime | DateTimeFieldUpdateOperationsInput,
? updatedAt?: DateTime | DateTimeFieldUpdateOperationsInput
}
}

Unknown argument assignedToUserId. Available options are listed in green.
at yn (C:\Users\xx\Desktop\issue-tracker\node_modules@prisma\client\runtime\library.js:116:5852)
at wn.handleRequestError (C:\Users\xx\Desktop\issue-tracker\node_modules@prisma\client\runtime\library.js:123:6429)
at wn.handleAndLogRequestError (C:\Users\xx\Desktop\issue-tracker\node_modules@prisma\client\runtime\library.js:123:6119)
at wn.request (C:\Users\xx\Desktop\issue-tracker\node_modules@prisma\client\runtime\library.js:123:5839)
at async l (C:\Users\xx\Desktop\issue-tracker\node_modules@prisma\client\runtime\library.js:128:9763)
at async PATCH (webpack-internal:///(rsc)/./app/api/issues/[id]/route.ts:48:26)
at async C:\Users\midg8\Desktop\issue-tracker\node_modules\next\dist\compiled\next-server\app-route.runtime.dev.js:6:62591 {
clientVersion: ‘5.3.1’
}

Try some of the solutions from this post Next.js Course part-2 Issue Tracker : Assigned issue to users - #6 by djb160