# 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: `lex: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#lex-in-place-mutation-only

## category

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

## referenced-by

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