新对话，用的claude sonnet。
Error: HTTP 400 Bad Request
Sherlog:
TraceID: 0xf5bf172e11119b39
Headers: {“Alt-Svc”:[“h3=":443"; ma=2592000,h3-29=":443"; ma=2592000”],“Content-Length”:[“328”],“Content-Type”:[“text/event-stream”],“Date”:[“Tue, 05 May 2026 08:18:32 GMT”],“Server”:[“ESF”],“Server-Timing”:[“gfet4t7; dur=589”],“Vary”:[“Origin”,“X-Origin”,“Referer”],“X-Cloudaicompanion-Trace-Id”:[“f5bf172e11119b39”],“X-Content-Type-Options”:[“nosniff”],“X-Frame-Options”:[“SAMEORIGIN”],“X-Xss-Protection”:[“0”]}
{
“error”: {
“code”: 400,
“message”: “{"type":"error","error":{"type":"invalid_request_error","message":"This model does not support assistant message prefill. The conversation must end with a user message."},"request_id":"req_vrtx_011Caj6NgBYENmiKF2kwV4g8"}”,
“status”: “INVALID_ARGUMENT”
}
} 求助，可以解决吗？
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