[Bug]: Memory extraction stores an empty valid_at for semantic items, and an unparseable timestamp is written through unchanged
![[Bug]: Memory extraction stores an empty valid_at for semantic items, and an unparseable timestamp is written through unchanged](https://www.chat-gpts.plus/wp-content/uploads/2026/09/18415-7895e527-768x403.jpg)
该问题出现在 RAGFlow 记忆提取(Memory extraction)流程中,当模型返回的 valid_at 为空或不是合法 ISO 8601 字符串时,会被原样写入数据库;semantic 类目约有 6.5% 的条目出现空 valid_at ,并伴随日志中的 [Bug]: Memory ex

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