---
title: "Discussion on \"Mastra working memory: fixing 'propertyNames' is not permitted (OpenAI 400) with Observational Memory\" | Hashnode"
description: "Discussion on \"Mastra working memory: fixing 'propertyNames' is not permitted (OpenAI 400) with Observational Memory\". With a working-memory schema and manageWorkingMemory on an OpenAI model, every extraction hits a 400 and falls back. Here's the version that fixes it, what to do if you can't upgrade, and how to check."
url: "https://hashnode.com/posts/mastra-observational-memory-propertynames-is-not-permitted/6af8881517458446be21d9dd"
---

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# [Mastra working memory: fixing 'propertyNames' is not permitted (OpenAI 400) with Observational Memory](https://memorysync.hashnode.dev/mastra-observational-memory-propertynames-is-not-permitted?utm_source=hashnode&utm_medium=feed)

With a working-memory schema and manageWorkingMemory on an OpenAI model, every extraction hits a 400 and falls back. Here's the version that fixes it, what to do if you can't upgrade, and how to check.

1d ago · 13 min read · memorysync.hashnode.dev  
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## Written by

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Building MemorySync (memorysync.io) — persistent memory infrastructure for AI agents, Cursor, and Claude Code.

Building MemorySync (memorysync.io) — persistent memory infrastructure for AI agents, Cursor, and Claude Code.

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