# Prefect 3.8.1.dev5 — 3.8.1.dev5: Nightly Development Release

- Product: Prefect (https://whatsnew.fyi/product/prefect)
- Vendor: Prefect
- Date: 2026-07-30
- Version: 3.8.1.dev5
- Original notes: https://github.com/PrefectHQ/prefect/releases/tag/3.8.1.dev5
- Permalink: https://whatsnew.fyi/product/prefect/releases/3.8.1.dev5
- Labels: Pre-release

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **fixed** — Confirm the exact suspension transition reported by a suspension event
- **fixed** — Fix codspell error on unit test TEST_BLOCK_CODE_BAD_SYNTAX on Windows
- **changed** — Clear stale expiration entries when a repossessed lease is missing
- **changed** — Reject unknown fields for FlowRunFilter and its nested criteria

<!-- Release notes generated using configuration in .github/release.yml at main -->

##### What's Changed
###### Bug Fixes 🐞
* Confirm the exact suspension transition reported by a suspension event by @devin-ai-integration[bot] in https://github.com/PrefectHQ/prefect/pull/22649
* Fix codspell error on unit test TEST_BLOCK_CODE_BAD_SYNTAX on Windows by @g-ringeisen in https://github.com/PrefectHQ/prefect/pull/22642
###### Development & Tidiness 🧹
* chore(deps): bump actions/stale from 10 to 11 by @dependabot[bot] in https://github.com/PrefectHQ/prefect/pull/22656
* Clear stale expiration entries when a repossessed lease is missing by @devin-ai-integration[bot] in https://github.com/PrefectHQ/prefect/pull/22657
###### Documentation 📓
* docs: document Submitting and InfrastructurePending states by @devin-ai-integration[bot] in https://github.com/PrefectHQ/prefect/pull/22660
###### Uncategorized
* Reject unknown fields for FlowRunFilter and its nested criteria by @devin-ai-integration[bot] in https://github.com/PrefectHQ/prefect/pull/22659

##### New Contributors
* @g-ringeisen made their first contribution in https://github.com/PrefectHQ/prefect/pull/22642

**Full Changelog**: https://github.com/PrefectHQ/prefect/compare/3.8.1.dev4...3.8.1.dev5