Sessions generated by different providers cannot be used after switching providers.

What version of the Codex App are you using (From “About Codex” dialog)?

版本26.429.61741 (2429)

What subscription do you have?

no

What platform is your computer?

macos arm m4 sequoia15.5

What issue are you seeing?

Sessions generated by different providers cannot be used after switching providers.

<img width="900" height="80" alt="Image" src="https://github.com/user-attachments/assets/fef0c8e4-dc71-41ea-8842-1e7ca7b9ffb6" />

What steps can reproduce the bug?

Create Session A using provider_a and pin it to the top. Then, replace the configuration file with a new one that supports only provider_b. Upon opening Session A, an error occurs.

What is the expected behavior?

_No response_

Additional information

_No response_