---
title: Troubleshoot schema management | Tiger Data Docs
description: Resolve common issues with database schemas and indexes
---

## Reindex hypertables to fix large indexes

**Message:**

```
ERROR: invalid attribute number -6 for _hyper_2_839_chunk
CONTEXT: SQL function "hypertable_local_size" statement 1 PL/pgSQL function hypertable_detailed_size(regclass) line 26 at RETURN QUERY SQL function "hypertable_size" statement 1
SQL state: XX000
```

You might see this error if your hypertable indexes have become very large. To resolve the problem, reindex your hypertables with this command:

```
REINDEX TABLE _timescaledb_internal._hyper_2_1523284_chunk;
```

For more information, see the [hypertable documentation](/docs/learn/hypertables/understand-hypertables/index.md).