# `AshPostgres.MigrationGenerator.OperationCycleError`
[🔗](https://github.com/ash-project/ash_postgres/blob/v2.13.1/lib/migration_generator/operation_cycle_error.ex#L5)

Raised when the migration operation dependency graph contains a cycle,
i.e. two or more operations require facts that only each other provide.

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*Consult [api-reference.md](api-reference.md) for complete listing*