# Codex client crash: "Unknown parameter: prompt\_cache\_retention" during context compaction (blocking issue)

**URL:** <https://community.openai.com/t/codex-client-crash-unknown-parameter-prompt-cache-retention-during-context-compaction-blocking-issue/1378988>\
**Category:** Codex\
**Tags:** bugs, codex-app\
**Created:** [April 14, 2026, 5:56pm UTC](https://community.openai.com/t/codex-client-crash-unknown-parameter-prompt-cache-retention-during-context-compaction-blocking-issue/1378988 "2026-04-14T17:56:23Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![nickzsb.nz](https://sea2.discourse-cdn.com/openai1/user_avatar/community.openai.com/nickzsb.nz/32/371628_2.png) [@nickzsb.nz](https://community.openai.com/u/nickzsb.nz)\
**Post date:** [April 14, 2026, 6:03pm UTC](https://community.openai.com/t/codex-client-crash-unknown-parameter-prompt-cache-retention-during-context-compaction-blocking-issue/1378988/3 "2026-04-14T18:03:38Z")

</div>

Same [Codex app errors on compaction - #2 by nickzsb.nz](https://community.openai.com/t/codex-app-errors-on-compaction/1378987/2)

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_[View the full topic](https://community.openai.com/t/codex-client-crash-unknown-parameter-prompt-cache-retention-during-context-compaction-blocking-issue/1378988)._