[Bug] 视觉理解模型问答报错 #4999
Description
Contact Information
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MaxKB Version
v2.7.1
Problem Description
对接kimi视觉模型多轮对话只要中间一次对话只发了文字，没有图片，下一轮对话发图片就报错
对接qwen-vl-plus和max报错如下
Steps to Reproduce
对接kimi和qwen视觉模型
The expected correct result
No response
Related log output
Additional Information
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