# root_type_mismatch

> A library entry keeps its block type; the captured block is of another type.

**Block type mismatch** · HTTP 422

## What it means

A library entry keeps its block type; the captured block is of another type.

## What to do

Capture a block of the same type as the saved one.

## Example

```json
{
  "type": "https://api.bymundi.com/problems/root_type_mismatch",
  "title": "Block type mismatch",
  "status": 422,
  "detail": "A library entry keeps its block type; the captured block is of another type.",
  "code": "root_type_mismatch",
  "requestId": "req_…"
}
```

How to read any error: [Errors guide](https://api.bymundi.com/docs/guides/errors.md).