[BUG] Message tree bug after Editing and Regenerating

[wadabee]

Describe the bug If you perform the following operations, the message tree will not be displayed correctly:

To Reproduce

• Send a message in a new chat
• Regenerate (the first message becomes 2/2)
• Send another message (the second message is created)
• Edit the first message
• The first message should become 3/3, but the second message becomes 2/2 instead.

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Additional context Add any other context about the problem here.

[github-actions[bot]]

This issue has been labeled as "stale" due to no response by the reporter within 1 month (and 14 days after last commented by someone). And it will be closed automatically 14 days later if not responded.