[Discussion]: After updating to 1.9.8, my assistant with 300k tokens conversation disappeared into thin air

Issue Checklist

• I understand that issues are meant for feedback and problem-solving, not for venting, and I will provide as much detail as possible to help resolve the issue.
• I have checked the pinned issues and searched through the existing open issues, closed issues, and discussions and did not find a similar suggestion.
• I confirm that I am here to ask questions and discuss issues, not to report bugs or request features.

Platform

Windows

Version

1.9.8

Your Question

[!NOTE] This issue was translated by Claude.

As mentioned in the title, I have no backup and I'm very anxious. I'm asking for a recovery method.

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如题，没有备份，很着急。 求找回方法

Context

No response

Additional Information

Priority

High (Blocking progress)