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# MigrationStage

Describes a migration between two versions of the same schema.

```
enum MigrationStage
```

## Topics

### Migration stages

[`MigrationStage.lightweight(fromVersion:toVersion:)`](/documentation/SwiftData/MigrationStage/lightweight(fromVersion:toVersion:))

[`MigrationStage.custom(fromVersion:toVersion:willMigrate:didMigrate:)`](/documentation/SwiftData/MigrationStage/custom(fromVersion:toVersion:willMigrate:didMigrate:))

## Relationships

### Conforms To

[`Sendable`](/documentation/Swift/Sendable)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

---

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