ai
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AI SDK by Vercel - The AI Toolkit for TypeScript and JavaScript
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text/mdx
title: AI_InvalidToolApprovalError
description: Learn how to fix AI_InvalidToolApprovalError
# AI_InvalidToolApprovalError
This error occurs when a tool approval response references an unknown `approvalId`. No matching `tool-approval-request` was found in the message history.
## Properties
- `approvalId`: The approval ID that was not found
## Checking for this Error
You can check if an error is an instance of `AI_InvalidToolApprovalError` using:
```typescript
import { InvalidToolApprovalError } from 'ai';
if (InvalidToolApprovalError.isInstance(error)) {
// Handle the error
}
```