Update app_v4.py

app_v4.py

@@ -200,11 +200,12 @@ def update_parameters(preset):
             params["steps"],
             params["controlnet_conditioning_scale"],
             params["guidance_scale"],
+            params["guidance_start"],
             params["guidance_end"]
         )
     else:
         # Default values if preset is not found
-        return 1.0, 8, 0.6, 3.5, 1.0
+        return 1.0, 8, 0.6, 3.5, 0.0, 1.0
 
 def process_image(control_image, user_prompt, system_prompt, scale, steps, 
                 controlnet_conditioning_scale, guidance_scale, seed,