The inputs of the conversation is can not be modified after the conversation created?

[rwecho]

Self Checks

• I have searched for existing issues search for existing issues, including closed ones.
• I confirm that I am using English to submit this report (我已阅读并同意 Language Policy).
• [FOR CHINESE USERS] 请务必使用英文提交 Issue，否则会被关闭。谢谢！:）
• Please do not modify this template :) and fill in all the required fields.

Content

https://github.com/langgenius/dify/blob/634b382a3d14e27a17e727d5a0311c8a87caafdc/api/core/app/apps/advanced_chat/app_generator.py#L143C13-L147C15

            inputs=conversation.inputs
            if conversation
            else self._prepare_user_inputs(
                user_inputs=inputs, variables=app_config.variables, tenant_id=app_model.tenant_id
            ),

I have a workflow, and update it add some inputs passed to the workflow nodes.
It's works for the new conversation, but for the old conversations it always uses the conversation's inputs not app_config.variables.
It's designed for that?

In the chat-messages API, we can modify inputs to adapter the workflow. For example:

We can pass width=1024, height=768 for one chat and width = 1024 , height = 1024 for another chat.

But as the code now , if the conversation created we can not change it.