Update

app.py

@@ -153,7 +153,7 @@ with gr.Blocks(css="style.css") as demo:
                 run_button = gr.Button("Run")
             with gr.Accordion("Advanced options", open=False):
                 style = gr.Dropdown(choices=style_names, value=default_style_name, label="Style")
-                negative_prompt = gr.Textbox(label="Negative prompt", value="")
+                negative_prompt = gr.Textbox(label="Negative prompt")
                 num_steps = gr.Slider(
                     label="Number of steps",
                     minimum=1,