# How to re-index unsealed pieces that are flagged by LID in Boost v2

As explained in the tutorial [how to upgrade from Boost v1 to Boost v2](https://boost.filecoin.io/tutorials/how-to-migrate-boost-v1-to-boost-v2), in Boost v2 the Local Index Directory periodically checks all pieces that the SP stores and confirms if there exists an *unsealed copy* of the data and whether it is *indexed*. If the index is missing, the piece is *flagged*, meaning that the operator of the SP should fix it if they wish to make it retrievable.

<figure><img src="https://437316145-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FfZMqMjrWeFXMBES7ehiI%2Fuploads%2FgNG1W4X8tDNx3MYhmAZv%2Fflagged-pieces.png?alt=media&#x26;token=959af3ed-1596-481a-b6d2-4138105923a6" alt=""><figcaption></figcaption></figure>

Fixing individual flagged unsealed pieces from the Boost Web UI is possible directly from the Web UI.

If the SP has a lot of flagged pieces, you can automate the re-indexing of pieces with the following commands:

#### Fetch the `piececid`s of all the flagged unsealed pieces from LID

{% code overflow="wrap" %}

```
// GraphQL query to get the first 100 flagged unsealed pieces from LID.
// If you have more than 100 flagged unsealed pieces, you need to modify the query
// and adjust the pagination parameters

curl -X POST -H "Content-Type: application/json" -d '{"query":"query { piecesFlagged(hasUnsealedCopy: true, limit: 100) { totalCount pieces { CreatedAt PieceCid IndexStatus { Status Error } } } }" }' http://localhost:8080/graphql/query | jq -r ".data.piecesFlagged.pieces[] | .PieceCid"
```

{% endcode %}

#### Trigger re-indexing of each `piececid`

```
// Re-index a specific piececid.
// Assumes that the piececid has an unsealed copy.

boostd lid gen-index <piececid>
```

#### Automatically re-index marked pieces only

This little script will fetch up to a thousand flagged pieces that are not processed yet, and will process them 4 at a time. Change the -P4 parameter to change the concurrency.

{% code overflow="wrap" %}

```shell
curl -X POST -H "Content-Type: application/json" -d '{"query":"query { piecesFlagged(hasUnsealedCopy: true, limit: 1000) { totalCount pieces { CreatedAt PieceCid IndexStatus { Status Error } } } }" }' http://localhost:8080/graphql/query | jq -rc ".data.piecesFlagged.pieces[]" | grep Registered | jq -r ".PieceCid" | xargs -P4 -L1 boostd lid gen-index
```

{% endcode %}