disabled concurrency limit

app.py

@@ -721,7 +721,8 @@ with gr.Blocks(css=css, theme=gr.themes.Soft(primary_hue="indigo", neutral_hue="
     button.click(
         fn=check_inputs,
         inputs=[subject, image_input, selected_index],
-        outputs=None
+        outputs=None,
+        concurrency_limit=None
     ).success(
         fn=handle_generation,
         inputs=[image_input, subject, duration, selected_index],