# prefab-invalid

> Talos 0.7 · Since 0.6

A prefab file that cannot be used: its shape, not exactly one root, an entity outside the root's tree, an id with `/` or used twice, or a prefab instance inside a version 1 file (a file with a nested instance says version 2), or a version other than 1 and 2. Also an instance with `tags` or `components` of its own.

| | |
|---|---|
| Severity | `error` |
| Source | `contract` |
| Offers a fix patch | no |

## Since / changed

See the version chips above and what changed.