# In-Place Mutation Only

> Upgrading by mutating the running environment in place, with no parallel target to cut over to or fall back from.

Record: `lexicon:in-place-mutation-only`
Kind: anti-pattern
Layer: [Correctness Core](https://banes-lab.com/records/layer/correctness-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-in-place-mutation-only

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Versioned Artifact](https://banes-lab.com/records/lexicon/versioned-artifact.md) and before [Infrastructure Cost](https://banes-lab.com/records/lexicon/infrastructure-cost.md).

## Category

- [Self-Healing / Recovery / Deployment Safety](https://banes-lab.com/records/lexicon-category/self-healing-recovery-deployment-safety.md)

## Negated by

- [Blue-Green Deployment](https://banes-lab.com/records/architecture/blue-green-deployment.md)

## Linked from

- [Self-Healing / Recovery / Deployment Safety](https://banes-lab.com/ontology/principles/architecture-category-self-healing-recovery-deployment-safety.md)